I know two excellent saddlers in the South East - Richard of Spragg Saddlery (07917 331233 www.spraggsaddlery.co.uk) and Louise of Shere Saddles (01483 202987 www.sheresaddles.com). Good luck finding one you like!
Are you looking for a new saddle? If so what sort of shape of horse? Otherwise if you want a saddle adjusted what sort of saddle do you have? Different fitters specialise in different things so it may be pertinent.