Been looking in to this a bit more and I don't get it.
Why pay £50/year when you have to pay £5 a time for the evening delivery when you can pay £5 a time for regular next-day delivery as a "normal" customer (albeit not evening)
Also, there's conflicting info (Stating they deliver next day to Swansea in the Prime FAQ, but no mention of it in the Evening delivery checker page). As I said previously, I usually get next day delivery anyway.. but I'm thinking of buying it as a gift for a member of the family.
Enlighten please!