A UK PPL has never restricted pilots to 5730Kgs! Type rated aircraft above that weight could be flown on a PPL with Group C rating. The Group A and B aircraft ratings imposed a 5730 Kg limit.
You can get a PPL with a 747 Type rating on it!
Since the change to JAA style ratings there is no weight limit on SEP aeroplanes,Group A no longer exists and the 5730 Kg limit has gone with it.
Satan,
You licence privileges relate to the State of licence issue and the laws of that country.