Well i can thoroughly recommend Gary at Wildside Cycles in Tunbridge Wells. He spent some time out in Holland in the early 90's riding with the Dutch teams trying to be a pro so he has some good experience. A lot of time was spent with me on my bike on the turbo trainer with Gary taking multiple measurements as i cycled.
Thanks to him I can now clip in and out smoothly due to a slight alteration on the pedals that I didn't know could be done. I had almost given up with not being able to get them out which annoyed me as i really can notice the difference that cycling with cleats makes. The cleats have also been screwed in at a slight angle to help position my foot at a better angle which then obviously helps position your knees and legs correctly to get a fluid movement.
My saddle height went from 612 to 655 and was moved back .That's a huge difference that i would never have believed would be done. I am 5'4 and to look at my bike you would think i was at least 5'9 with the height of the saddle stem. I must have looked dreadful before. This has really helped my climbing.
I have got high arches and now have some different insoles to stop my numb toes.
My handle bars have been rotated slightly towards me to allow me to have a better hold on the hoods and so therefore the brakes and gears and so that i can use the drops as it was too uncomfortable before.
On paper it doesn't sound much but I have picked up lots of tips, I don't have numb toes now, I have now climbed the 4 hills near me 2 of which have always defeated me and my back no longer hurts.
I know the price, £120 quid, ( a birthday present) is a bit steep but i think its been well worth it.