Tesco Boost (Clubcard Vouchers) Request

Hope this is the right place to post this. Mod move if there if a more appropriate location. We have been saving our club card voucher now for over a year. (we shop in various supermarkets)
We have a family member visiting next month and we though it would be nice to go to the Hard Rock Cafe, in Temple Bar for a treat. We were just wondering about the process for receive the voucher. The process seems clear enough for Dantes pizza on the tesco website. Fill in the form and the code is email to you within two hours, at which point it is up to you to book with the restaurant. We are kind of wondering whether to hold out for the next set of vouchers so the only thing we will need to pay for hopefully would be our drinks and the tip.