For those of you who want a covering letter to take with you.
My doctor wanted to charge me £30 for a letter (to which they recieved an extremely pointed reply) so I saw my diabetic nurse at the local hospital trust (not doctors surgery) who printed out a form letter which they seemed to have...
I was diagnosed Last November (2007) as type 1 - I was told that i had to inform my insurance company - Hastings Direct - so I phoned them up and they just asked 'have you been told not to drive' - i said no - and they said OK no problem - and thanks for letting them know !
Great I thought !