The National Diving & Activity Centre

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Diving Times

(Clear of water 1 hour before end of session)

Activity Times

Activities are open most weekends, bank holidays, selected dates during School Holidays & occasional mid week dates.

Please see our full opening times ›

Activities & Events

Site Facilities

Diving Information

Centre Information

National Diving & Activity Centre
NP16 7LQ

Please be advised that the NDAC office is closed Monday to Thursday, so emails and phone calls may not be responded to during this time. Depending on when you make your enquiry it may take a few days before we can get back in touch with you.

The Wire. One of the longest Zip Slides In The UK at the NDAC, Chepstow.

The Wire is one of the UK's longest, tallest and fastest zip slides, running the 700 metre length of the NDAC Quarry.

Launch yourself from the 70m high cliff edge and speed along the length of our 80m deep flooded quarry.

Reaching speeds up to 40 miles per hour this exhilarating ride will take your breath away!

Terms and Conditions for The Wire Zip Slide

Last updated 07 June 2019

Health Warning – If you are in any doubt, don’t participate in any of the Activities.

Download a PDF Version of the Terms and Conditions > 541 KB


Certain experiences provided by us are subject to a minimum age, health or other requirements. These details are listed on our website and below, they are also listed in your booking confirmation and at registration. It is the purchaser’s responsibility to check that the restrictions are met. Once you have confirmed a booking you are not eligible for a refund if you are forced to cancel because the minimum requirements are not met. Details of restrictions and requirements are below. Please read them carefully.

  • The Wire
  • Lower Limit is 30kg (4.7 stone)
  • Height restriction, you must be taller than 1.2m (3ft 11") and shorter than 2.0m (6ft 7")
  • You must be able to climb the ramp leading to the activity.

  • The Swing
  • Lower Limit is 20kg (3.15 Stone)
  • Height restriction, you must be taller than 1.3m (4ft 3")
  • You must be able to climb the set of steps leading to the activity.

  • For both The Wire & The Swing
  • Maximum weight limit is 120kg (18.8 stone)
  • Minimum age is 12 years
  • You must be able to fit into our harnesses.
  • Alcohol – If you appear intoxicated you cannot take part in the activity
  • Under 16’s require a parent or guardian’s permission and signature
  • Disclaimer consent must be completed to comply with our insurance regulations
  • Glasses and hard contact lenses can be worn
  • Please wear appropriate footwear and clothing

If you are not in good health you should NOT participate

If you have any of the following conditions you should seek medical advice before participating and provide a doctor's note on the day.

  • High Blood Pressure
  • Heart Condition
  • Suffer from Dizziness or Epilepsy
  • Damage to neck, back, spinal column, legs or eyes
  • Head injury
  • Asthma
  • Pregnancy

Medication - please inform us if you are taking any form of medication. If you suffer from any of the above but have been given a doctors certificate, You will be requested to sign a non standard waiver


General Terms and Conditions of Business

The National Diving & Activity Centre Limited (NDAC Ltd) is the supplier of the activity that appears on this website. When you purchase an activity or book with a voucher from The National Diving & Activity Centre Ltd (NDAC Ltd) or with a voucher provided by an external provider you become legally bound by these terms and conditions specific to that said agreement. Please do not proceed and book or an activity or complete a booking until you have read, understood and accepted these terms and conditions in the first instance. These Booking Terms and Conditions apply to the booking of "The Wire" or "The Swing" they will be known as the "Activities" this will also include any ancillary products that are associated to NDAC’s Terms and Conditions (T&C’s) of business.

These booking T&C’s contain important information concerning participation by you and members of your party and, accordingly, you acknowledge and agree that you shall ensure that all members of your party are aware of and accept these Booking Terms and Conditions. At no point shall any variation to these Booking T&C’s be binding unless agreed in advance in the form of a Specific Event Agreement (SEA) in writing by NDAC Ltd. Any typographical clerical or other error or omission in any booking confirmation or other associated documentation issued by NDAC Ltd (including any electronic documentation, emails, printed literature or SMS Text) shall also be subject to correction without any liability on the part of NDAC Ltd. NDAC Ltd will always reserve the right to make changes to the Activities, whether to conform to any applicable safety or other statutory industry requirements or otherwise at short notice. NDAC will also conform to all regulations and standard amendments (best practice) from other industry members.

No booking shall be deemed to have been accepted unless accepted in writing by NDAC Ltd (which shall include our email confirmation of booking if booked via our on line booking system). These Booking T&C’s incorporate our Privacy Policy, and assumption of Risk and Release of Claims and Rules of Participation. You and each member of your party will be required to sign and book in upon arrival at the centre. A standard disclaimer form with the Assumption of Risk and Release of Claims along with our site specific Rules and Regulations (R&R) of Participation before being allowed to undertake any of our Activities. You must therefore advise NDAC Ltd as soon as possible of any mistakes or amendments in our booking confirmation. NDAC shall use its commercially reasonable efforts to ensure that you and your party’s participation commences at the time booked (if booked in advance) and it shall be the responsibility of each participant to ensure that they arrive in sufficient time for the Activity. Late arrivals may not be permitted to undertake the Activity if they fail to make their allocated booking time and no refunds or compensation will be payable in such circumstances unless authorisation from NDAC staff has been agreed in the first instance.


Subject to any terms agreed to in writing between NDAC and you, our standard charges and fees shall be calculated at our current rates and full payment shall be due at the time of booking along with any specific offers. Any discounted and promotional codes must be given at the time of booking as prices of activities may vary throughout the year. In the event of an order being placed against an accidental incorrect price, we will endeavour to inform the purchaser of the error within 14 days of the purchase being made. We will allow the purchaser to either cancel the booking or choose to pay the additional difference in price. Vouchers and purchases from external voucher providers may vary, NDAC shall not be held responsible for purchases or the prices displayed on external websites and other gift experience companies. If you are in any doubt please call the centre to discuss your concerns in the first instance.


All of our Activities are weather dependent. Weather can be unpredictable and events do have to be cancelled occasionally. High winds, lightning and thunderstorms are our main concerns.

Cancelling an event can be a huge inconvenience for both participants and ourselves, however your safety is paramount and we would appreciate your understanding. If bad weather affects a booking it will be rescheduled by NDAC at no extra charge to you for a later date. We will endeavour to reschedule it as soon as possible. No refunds will be given.

There can be no guarantee that a particular date will not be withdrawn due to adverse weather conditions.

If poor weather is predicted, we recommend that you contact us before you depart for your activity. Please be aware weather conditions can change quickly and Activities can still be cancelled on the day or after the event has started, should the activity be deemed unsafe. Non attendance on a day will see you lose your Activity.

In the event of cancellation, NDAC will not be held liable for any costs of lost insurance premiums, travel expenses, pre-booked accommodation costs or any other costs incurred.

Please ensure you have provided us with all your contact details and include the mobile phone number you will have with you on the day.

During specific wind conditions on the Wire Zip Slide, you may not quite make it to the landing zone and find yourself suspended in the air. If this happens one of our instructors will come out onto the Wire Zip Slide and pull you into the landing zone. The time it takes to pull you to the landing zone will depend on how far out from the edge you have stopped. Throughout this process you are completely safe.

If you have any questions about these areas, please speak to a member of staff prior to your activity or give us a call beforehand.


All Activities offered subject to the availability of dates, facilities and crew. Bookings should be made as far in advance as possible especially during peak times (weekends and school holidays). We suggest if you plan to book an Activity or purchase a voucher for a date at short notice, you should call us to ensure there is still availability before completing the transaction. You should not make any travel or accommodation arrangements in connection with the Activity until you have received your booking confirmation with a date and time on it from NDAC. Where specific elements of the Activity are not available due to mechanical breakdown, we reserve the right to make reasonable substitutions on the day. If this is not possible we reserve the right to cancel the Activity at short notice.

Duration and Time of Activity

The time of your Activity is a guide time only, there is no guarantee that you will complete your Activity at the exact time given on your booking confirmation however we try to stick to these times as closely as possible. Please allow plenty of time on site and we recommend a minimum of 20 minutes. Where the duration of an activity is mentioned on our website and marketing material or by a member of our team this is an approximate guide to the length of time you should expect to be at the venue. The duration may vary slightly from time to time and is always number dependant. When you are taking part in the Activity as part of a group there may be some extra waiting time involved. You can just turn up sign the paperwork and join the cue we will operate this on a first come first serve basis.

Descriptions & Images

All descriptions contained on our website and in our marketing material are correct at the time of going to press. Descriptions may be updated throughout the year as the Activity may change. The images used in all promotional literature to illustrate Activities, are used as an indication only. NDAC shall not be responsible for the descriptions and images of external websites and gift experience companies.


We ask you to leave plenty of time to get to the venue. All of the Activities we offer require registration, safety briefings on your part, it is therefore essential that the participant has booked in and has completed the correct forms otherwise they will not be able to participate in any Activity. No alcohol or drugs can be consumed before any of the Activities we offer. Our crew reserve the right to refuse an Activity to persons suspected to be under the influence of alcohol and / or drugs. All Activities require the wearing of safety equipment such as harnesses, this is mandatory and there are no exceptions. If the harness does not fit you correctly, you will not be able to take part in the activity. Other safety precautions will be advised to you upon arrival at site and also in your confirmation details. We employ professional instructors who reserve the right to end an Activity if they believe the participant may endanger themselves or other members of the public. Our address and phone numbers are The National Diving & Activity Centre Limited, Tidenham Quarry, Tidenham, Gloucestershire, NP 16 7LH Tel 01291 630046 or visit our website for more information.

Refunds and Cancellations

If you change your mind about your purchase, NDAC will refund booked activities and vouchers bought direct from the NDAC Ltd within 14 days of purchase, minus a £5.00 administration fee, providing it is also 14 days or more before the date of the activity. After 14 days from booking and/or for less than 14 days before the stay, no refund will be given.

Payments made by debit card or credit card will be refunded to the same card or, if the card has subsequently expired been lost or damaged payment shall be made by cheque. Any payment made by gift card or voucher will be refunded by the issuing of a replacement voucher or gift certificate for the same value. Where a multiple form of payment has been used we reserve the right to refund or amend by credit, cheque, voucher of gift card.

Where gift vouchers have been bought from external providers and a booking has been made, no refunds will be given. Should you need to re-schedule a booking you have already made, a £5.00 administration charge will apply to move to another convenient date. Should you need to cancel a booking you have already made, no refunds will be given and voucher validity will be lost. For participants failing to turn up to an event, you will not be able to reschedule bookings, no refunds will be given and voucher validity will be lost.

Sometimes the NDAC may have to cancel activities for reasons, such as the weather, mechanical breakdown, or because minimum requirements are not met (such as a minimum group of people). We regret such eventualities, but in these circumstances NDAC is unable to reimburse travel, accommodation or any other expenses you may incur in relation to the cancelled activity. An activity may be terminated without warning during the lifetime of vouchers and bookings, on these occasions an equivalent or alternative location or activity may be offered at our discretion. If this is not suitable, credit will be offered but no cash refunds will be made.

Booking Confirmations

NDAC bookings shall be deemed to have been accepted unless accepted in writing by NDAC (which shall include NDAC’s email confirmation of booking). These Booking Terms and Conditions incorporate NDAC’s Privacy Policy, and Assumption of Risk and Release of Claims and Rules of Participation. You and each member of your party will be required to sign the Assumption of Risk and Release of Claims and Rules of Participation before being allowed to undertake the Activity. You will also advise NDAC as soon as possible of any mistake in our booking confirmation. Confirmations can be delivered by email to the email address entered by the person making the booking. Be aware that some email accounts may categorise our email confirmations as unwanted or ‘spam’ email. To avoid this please add our email address [email protected] to your address book. NDAC is not liable or responsible for any loss suffered as a result of an email voucher being blocked by web filters or firewalls. If the recipient does not receive the email voucher, please contact us immediately to send vouchers to an alternative email address.

Gift Vouchers

Validity & Extensions. Each voucher will show a unique code, which must be quoted when dealing with NDAC and will be used to identify your booking and proof of purchase. Vouchers and the associated references must be kept safely and securely and presented to NDAC on the day of your Activity. Please check your expiry date, you must book and complete your activity prior to the expiry date on your voucher. Failure to produce a valid voucher on the day of your experience means that full payment will be required to cover the cost of the activity and you’ll only be able to take part in the activity if time slots are available. This payment will be refunded on receipt of a valid voucher in the post alongside a completed deposit refund form within 28 days. We reserve the right to refuse participants who arrive without a valid voucher. NDAC will take no responsibility for any loss you may incur as a result of impersonation or identity fraud. A voucher will be deemed to be invalid if it is out of date unless you have written prior agreement from NDAC or an external provider (the validity date is clearly stated on the voucher).

For customers with a NDAC voucher with a voucher code prefix of NDAC and the customer or recipient is unable to book and take the activity before the expiry date, then upon the customer contacting NDAC prior to the expiry date on the voucher and paying an administration fee of £5.00 to NDAC shall extend the validity of the voucher for another 12 months (from the date of the initial expiration). A voucher can only be extended for another 12 months once. Once a voucher has been extended it cannot be refunded. Vouchers can only be extended if they are still inside their expiry date. NDAC strongly recommends that all Activities are booked as early as possible to avoid disappointment.

Voucher Bookings Individual or Small Group Bookings. All vouchers must be booked in online at Do not arrive at the venue expecting to redeem your gift voucher without first booking your activity on the NDAC website. NDAC Ltd will not be held liable for your costs incurred if you do not follow the procedure set out in these Terms and Conditions. Bookings are not finalised until you have received written confirmation from The National Diving & Activity Centre.

Corporate & Group Bookings

Corporate & Group Bookings are treated the same as individuals unless a separate Specific Event Agreement (SEA) is in place, in this instance please consult your contract for information. In the event your booking is made via NDAC’s Booking Contract, these Booking Terms & Conditions shall be subject to any special terms set out in the Group Booking Contract.


The very nature of some of the Activities that we promote means that they are dangerous. Prior to ordering or participating in any experience you should be aware of the risks involved. NDAC can provide further information if you are in any doubt about any experience. We hold a valid public liability insurance and this is always available to view on site if you wish to see it please ask a member of staff.

Discount Codes

Discount codes are issued subject to availability and can be withdrawn without notice at any time. NDAC reserves the right to stop discount codes being used against specific products. Only one discount code can be used per order. Discount codes apply to both online, individuals and or groups who just turn up who wish to participate.

Venue Liability

NDAC except as otherwise provided in these Booking Terms and Conditions shall not be responsible for the loss, or damage, of or to any property or to person arising from the booking of or participation in the activity. NDAC shall not be responsible for the actions and quality of external providers or any loss or damage suffered by you whilst you are attending one of our Activities. By participating in an Activity with us you acknowledge that certain factors are beyond the control of NDAC and agree that neither NDAC shall be liable for the cancellation, postponement or alteration of any activity for reasons beyond its reasonable control including for weather-related reasons, mechanical failure or otherwise. In the event of mechanical machinery break down you should expect reasonable substitutions without notice. The total liability of NDAC for any claim whatsoever in connection with the Activity or voucher or any course or experience shall be limited to the price paid for the voucher or booking.

Timings & Late Arrivals

We urge you to treat a trip to your activity as you would catching a flight or train. This is because every participant has a scheduled activity time. If you are late we will endeavour to put you through your activity but this will be subject to conditions on the day. NDAC shall use its commercially reasonable efforts to ensure that you and your party’s participation commence at the time booked and it shall be the responsibility of each participant to ensure that they arrive in sufficient time. Late arrivals may not be permitted to undertake the Activities and no refunds or compensation will be payable in such circumstances.

Personal Belongings

It is the participant’s responsibility to ensure that they are in possession of their personal belongings following their experience. NDAC has no liability to compensate or offer replacements for items lost at one of our Activities.


Spectators are more than welcome to watch you participate in your selected Activity. When booking your date please check our website for details. Spectators are required to comply with our locations terms, conditions and expectations of conduct. Any spectators deemed under the influence of drugs or alcohol will not be permitted on site.


Please respect our neighbours and show consideration for local residents whilst taking part in, waiting for, or spectating activities at the National Diving & Activity Centre.


All merchandise is offered subject to the availability of equipment facilities and crew and there can be no guarantee that merchandise will be available on the day of your activity. All merchandise is provided at an additional charge and is in no way linked to the price of your experience. Prices of merchandise may vary throughout the year. Where specific elements are not available, we reserve the right to make reasonable substitutions on the day. If this is not possible we reserve the right to cancel merchandise at short notice.

By participating in an Activity with us you acknowledge that certain factors of merchandise are beyond the control of NDAC and agree that neither NDAC nor any associated Partner shall be liable should certain equipment associated with merchandise such as cameras not are working at the time of your experience. If for any reason you are unhappy with any of the merchandise received, you can return any of them to us for an exchange or refund within fourteen days of purchase. We make no charge for returns. Returned goods must be unused and supplied with their original packaging. All returns must have a completed returns form.

Photographic and video recording equipment

The use of devices such as cameras, video cameras or mobile phones whilst descending the zip wire is forbidden due to divers operating in the water throughout the day and night. Our insurance only allows authorised head and arm mounted equipment that has been installed and certified by NDAC ltd.


CCTV is in operation throughout the site 24 hours a day and monitored for the purposes of crime prevention and public safety. This scheme is controlled by the National Diving & Activity Centre. For further information please contact us.

Privacy Policy

For details of how we use your information, please visit our Privacy Policy



Health Warning – If you are in any doubt, don’t participate in any of the Activities.

Follow the Wire Zip Slide on Twitter @TheWireChepstow




National Diving & Activity Centre, Tidenham, Chepstow, Gloucestershire, NP16 7LQ. Tel:    Email | Website by Studio JERO | Hosted on Pipe10 Servers