Managed to get a £50 Amazon gift card from Superdrug and have applied to my Amazon account. Weird thing was the gift cards were NOT at the till. I asked and they pointed me to a corner where they had the usual (physical) gift card which also included Next, Accesories (Accesorize?), Google Play and a few others.
Thought I'd mention this in case it helps any other members.
I bought the same today, from the rack in front of the tills
