We use Martin Wilkinson from Herts - have also used Mill Saddlery.
Bridlepath didnt have a great reputation when i was looking so have never used them.
Mill saddlery - Liz legget does our saddles and she is great. She was recomended to me by ILPH in Snetterton, yes I know everyone in norfolk claims to fit ILPH sadles, but hse realy does.