Penalty points, when to notify insurance?

I got stopped for speeding and rang insurance company the next day. They said to ring them back when I get the letter confirming the points. I got the letter with the fine today and paid it in the post office. Do I get another letter telling me the points have been applied and when do I ring the insurance? Now when I have paid the fine and accepted the points or when I get the next letter (if I get another) to tell me the points have been applied? This is the first time in 19 years of driving this has happened to me so I don't know the procedure.