I'll add an NHS one(!) Am currently embroiled in a battle to get them to change my pre-payment prescription address to where I've moved - the consequence of which is they keep sending me letters saying I haven't actually got a pre-payment, and can I give them some money for claiming when I wasn't supposed to.
So they can change the current one, the direct debit address but... getting them to change the one that renews the end of the month has been impossible! Apparently they can;t do it, and when they ring the person who can change it, apparently none of them can hear one another to do it!
And the basic question is, why won't their systems feed into one another so when I change doctors and change address, other NHS related info can be changed too?
(Apparently we should blame Harold Wilson for insisting on ICL supplying the IT tech back at the very beginning!)