chimney rebuild

Does anyone have an idea of someone wh could do a chimney rebuild in redhill, surrey?

The chimney we have has very poor pointing and the bricks are looking unsecure in some parts!

and how much does this cost? Its a 6 pot chimney. And shared between two houses? one half if in good order and the other as mentioned. Would the whole thing need re doing or just the poor half?

I think a quote on that would have to be subject to survey. See if you can get a recommendation for a builder from a friend or neighbour.