I got three points for doing 36mph in a 30 zone. It happened at the time I was about to renew my insurance, and my insurance company certainly increased my renewal premium by something like £30 or £40 I think when I informed them.
Needless to say I went on the comparison sites and managed to get the premium down to a more reasonable level.
But remember, by law you have to declare any points you have received for the following three years.
So, I'm sorry I can't agree with Lazarus's statement, and as for revpat, it sounds so casual that it was just noted on 'the account'.
Perhaps I'm with the wrong insurance company or broker!