I use Keith from L for Leather and he is brilliant. I have had 5 made to measure saddles of him over the years plus second hand ones.
I have known him not sell a second hand saddle because he didnt have any that fit perfectly. There are not many saddle fitters that would walk away from a sale rather than try and fit an "OK" fitting saddle.
He will travel but you have to pay his expenses to get to you. I am near Chorley and he comes to me.
Ditto heather is wonderful! Can't recommend her highly enough, she was also recommended to me by 5 people on the yard. I wouldn't recommend katie topping. Gosh, overuse of the the phrase "recommend"