Car insurance

It made no difference at all to my car insurance when I informed them. Didn't really sound that interested, just said they would make a note of it. Time to get another meerkat methinks!

You could challenge it, as they are not allowed to load for a disability. But, for such a low amount, they could say it's an admin cost to alter your policy details. It's worth enquiring as to how the charge was made.
For the record, I have never been charged. One company did say they should charge for the admin, but waived it, as "nobody wants to be diagnosed diabetic, so they wouldn't charge me as it wasn't a change you want to make"

I've never paid any extra on my insurance as a diabetic. If I remember correctly, they just asked a few questions regarding medication etc.