You can redeem your National Rail 2 for 1 voucher online when visiting the Days Out Guide Website. Please follow the instructions to complete your booking for Madame Tussauds London. On the day of your visit, you will need to present your train tickets, booking reference number and payment card to fully redeem the offer.
If you are unable to apply this discount via the website or have any troubles don't worry!
Simply bring your printed voucher to the attraction to exchange with a cashier. (For these offers we do not accept screenshots, emails on phone etc.).
Please make sure you are using a valid train ticket for this offer by visiting here