What is an online saver ticket? With online discounts available when booking in advance and alongside other London attractions you could save up to 30%! For more information or to book your online saver ticket click here. Related articles What is a Shrektacular Ticket? How do I contact you? What if I'm running late for my time slot? How can I redeem my National Rail Days Out 2 for 1 Voucher? Am I entitled to a free carer ticket?