After dealing somewhat unsuccessfully with several high street type firms of accountants I found my current one through a recommendation from my bank's mortgage advisor!
He works alone from home and so has zero overheads. If he needs office facilities he uses a desk at one of his bigger clients. Its very much a case of 'Wherever I lay my laptop, that's my home'.
He is by far the best accountant I have ever met or heard of. His first job for me was to deal with a very difficult tax investigation which could have ended up with me in jail. He tied the tax office up in such knots that they couldn't drop the case fast enough. He has since performed similar magic for a friend of mine.
I am very lucky to have found him - all his clients come from personal recommendation and he doesn't advertise. He makes a very good living but his fees are relatively tiny as he has no costs.
Particularly if you pay cash!
I am sure that there are plenty of accountants out there like mine but they are very difficult to find. I guess you just need to ask around.
Bob