To make a booking using the Offer, members of Health Service Discounts should call 0871 221 2878 and quote the reference ”HSD16”. Payment will be requested over the telephone and all major credit cards are accepted. The cost of tickets will be inclusive of VAT at the prevailing rate. Proof of NHS employment may be requested from members at time of booking or upon arrival at the attraction. All bookings must be made at least 24 hours before the date of the visit. This offer is not available on arrival at the attraction. The offer cannot be used in conjunction with any other offer, voucher or discounted entry. We reserve the right to close any attraction in part or in whole throughout the year without prior warning. When tickets are sent in the post or by any other means, then the risk of loss or theft of such tickets shall pass to the addressee at the time the tickets leave the attraction's possession. Members may wish to ensure that they have adequate insurance cover for all such tickets. Tickets cannot be exchanged or refunded, and are valid for the 2016 season only. All persons visiting the Attractions do so subject to the terms and conditions of entry for each Attraction. Opening times and terms and conditions of entry for the Attractions are displayed on each Attraction’s website.