Oh, even in the UK, there is SOME uncontrolled airspace. There's no obligation to talk to a FIS, which is just that, an Information Service, but in a small busy country it might well be a good idea to have communication established. You don't need to keep bothering them, and it makes the service provider's life easier not to have too many unidentified aircraft on the screen. Just keep it to what's necessary.
Yes, I like NORDO but it isn't always entirely wise. Got to admit to leaving the radio off as much as possible when ballooning, though.