We had Miles Newby do ours - he did a lovely job, he is a lovely guy, he takes great pride in his work, is very enthusiastic and is completely trustworth with keys etc. His website has gone but I found his phone number 020 83400123 or yell https://www.yell.com/biz/newby-and-son-london-418033/.
I found him via one of the forum topics here - can't remember who recommended him, but I could not be happier with the finish on my little blue house.
Tom Stone is fab - done lots of work in the area here's his leaflet
Jason Lord did a wonderful job of our house just two weeks ago, front and back. He's very tidy and courteous.