So the top ten richest British/British based footballers are:

1 David Beckham £65m
2 Dennis Bergkamp £37m
3 Michael Owen £30m
4 Robbie Fowler £28m
5 Alan Shearer £22m
6= Sol Campbell £20m
6= Rio Ferdinand £20m
6= Ryan Giggs £20m
6= Roy Keane £20m
10 Thierry Henry £18m

Apparently Emile Hesky is also in the top twenty, thanks to his succession of signing on fees

Didn't expect Dennis Bergkamp to have that much money though. He's Dutch, so maybe it's drug related