Do your prices differ online to what they are on the day? Yes. Tickets purchased online in advance give a 20% saving and you are also covered by our rainy day guarantee. To pre-book your tickets please visit here. Related articles How do I use my National Rail Days Out Guide 2 for 1 voucher? Why do prices vary depending on the time of my visit? How can I use my 2-4-1/ Promotional voucher online? Can I use my Tesco Clubcard for entry into SEA LIFE Weymouth? Can I purchase tickets on the day?