Actually they have been told to pay the money back and are subject to retrospective rules.
These rules are tougher than before but still not as tough as those imposed by Cameron on Conservatives last summer. Remember those Conservatives who do not pay money back will not be allowed to stand again at the next election. Most have done so but more will need to do so soon.
What amuses me is that Brown thought that Legg would be a patsy and he has turned around and bitten them. Good for him.
Brown having to repay £12k,wonderful.
If you want political chaos and uncertainty at a time when clear and decisive leadership is needed to steady the markets and get this country out of the mire then by all means do what howard is saying. Most people have more sense than that.
Cameron has repeated this.
http://page.politicshome.com/uk/mps_who_dont_repay_cant_stand_as_conservatives_says_cameron.html