They're certainly in demand in the rural area I live in, and the few tuners there are have miles and miles to cover to do their work. My mate Kevin Brice at St Albans runs Brooklands Pianos, who restore and tune and I'm sure he'd fill you in on any relevent detail. Just tell him it's my fault you're phoning. He can berate me by email if he wants!
Tel: 01727 863071
Email: enquiries@brooklandspianos.co.uk