Hi
Yes, Norfolk and Norwich is very good, really good team and as Gail says, they have a daily drop in which can help, as well as a dedicated phone line for the nurses so you can usually get hold of a nurse within a few hours if you need someone. They don't have great provision for putting adults onto pumps but you appear to already have one so that wouldn't be an issue for you. The clinic is great in that everything is in the one place. So you go up for your review and have your bloods taken, eye photos etc and then the results are there and waiting for when you see the doctor 20 minutes later.
If you're in Norfolk you would either be assigned to the N&N, Queen Elizabeth in Kings Lynn or James Paget which is Great Yarmouth way. I don't have personal experience of the latter two but from what I've heard N&N is the better of the three.
Don't know Hingham too well but a pretty nice area from what I've seen when going through it. Very rural though so not much in the way of public transport etc.