if you have only got 3 points on the licence, it don't really matter too much, as insurance compaines see 3 points as nothing to worry about. 6+ then it's a case of "drop em and be prepared". in your circumstance, it sounds like it won't be much as it will probably classed as an SP30, if it's on the non motorway part. SP70 IIRC is excessive speed on a motorway. I know this as I got pulled in the company car (who'd thought a 1600 Diesel could go that fast :lol:)
Hope this is any comfort