Can I use my 2 for 1 online and use it against the online price? 2 for 1 vouchers cannot be used in conjunction with any other offers or promotions including the online discounted rate. For information on how to redeem your voucher, please visit here. Related articles How do I pre-book entry for a promotional voucher? Can I use Tesco Clubcard for entry? How do I redeem a 2 for 1/Promotional Voucher? Can I use a 2 for 1 voucher in conjunction with the attraction pass? When can I see the Trolls?