Picked up my Dark grey cooper s
JCW last night, 3 hour journey there and 3 hours back

Bought it from a member on mini2, Maxim i believe. Superb car, really happy with it. It's got the
JCW seats which are very supportive but spent most of the journey home trying to get my lower back comfortable, its gonna take a while
Must get back out on the roads!
Quick question, for my insurance discount with Mini2 they want proof of being a paid up member, wheere could I find this?