When I used to be down in Hampshire I used to use a lady called Hilary Vernon, she saddle fits for Barnsby and also has her own bitting range called informed bitting (really helpfully esp with my very fuss mare!) so you can kill to birds with one stone!
Ive had horses in Hampshire for 15 years, been through several saddlers who I would not recommend. I use Susan Slade (just out of hampshire in west sussex), all 6 horses have good fitting saddles now, she was also recommended by the horse physio I used.