FIC
Due your location, I believe your best bets are TPC Denham, Carole Cooper at Andrewsfield and Stapleford Flight Centre at, er, Stapleford.
Can personally recommend TPC Denham. Nice environment and aircraft fleet. Whilst I can't comment on Carole Cooper's FIC she did my examination - nice lady who's approach seemed faily consistent with what I'd been taught. I have no experience of SFC.
Further afield, there's Lance at BCFT - I gather quite good but with a tendency to make instructors cry!!
Duchess Driver, you wouldn't happen to be the legendary 'Bouncer of White Waltham', would you?!