Buy a National Rail ticket and register 'n' print a voucher from Days Out Guide
to get 2for1 entry to some top UK attractions, incl Drayton Manor, Madame Tussauds, Legoland, London Zoo (see the full theme park list
or the zoo and wildlife list
You need to print a voucher for the relevant attraction (follow the link above and search for it) AND have a valid rail ticket bought from National Rail on the same day. It's worth doing this even if you’re not travelling by train – a cheap single ticket is available for a couple of quid, far cheaper than the entry ticket price (Thorpe Park is the most expensive at £50 on the gate).
Just stop by the nearest station on your way and pick one up, then present both to get your 2for1. Crucially, your rail ticket must show that you have travelled to one of the stations nearest the attraction. So for Thorpe Park, you need to have a ticket with an end destination of Staines or Chertsey.
The offer's ongoing, but check the voucher for each individual attraction's restrictions, as these vary.
MSE Frederika says:
Electronic ticket barriers can sometimes gobble up your ticket, so to make sure you don't lose your proof of travel, ask a member of the station staff to help you through.
Excludes family, advance and web tickets as well as Oyster cards, and tickets and travelcards bought from London Underground. Can't be used with other offers or promotions.