We had a good local builder / odd-job man in Teddington - he's not a decorator as such, but he's a realy 'handyman' and will do most things. He charges around £160/day plus materials. For example, he re-painted our front door, re-rendered and painted the front of the house, put up shelves, cleared gutters, repaired wobbly steps, etc.
I know a lovely handyman who is excellent at decorating jobs and charges v reasonable prices. He will do most stuff, including basic plumbing. He's based in Richmond. He's done some plastering for us in our bathroom and I thought he did a great job. He's also painted the outside of our house, put in a bathroom and done all the decorating, done numerous little niggly jobs and he's reliable, honest and cheerful.
His name is George Blanchard and you can find his details on yell.com.