Please find below a few notes below that may assist you if you are having problems with the vouchers.
(1) A number of vouchers will not open correctly on the YAHOO Internet Service, and therefore it is suggested the parents try to download these via Google / BING or any other internet browser.
(2) Parents need to be reminded to open the URL code and not just show the text / email to the supermarket – The URL connects through to the actual voucher, where the code cannot be put within a till system for the voucher to be redeemed.
As previously mentioned within a different email, these are normal supermarket vouchers and have the following expiry dates:
Tesco – 5 years from date of purchase
I can also confirm that if people want to save their vouchers and spend a number together on “a big shop” then this is also ok.