Another recommendation for Dave from Down The Drain. I originally called him a few months ago for a problem that, rather embarrassingly, resolved itself before he arrived. But despite the fact that he had spent half an hour looking for our flat in Tulse Hill ( I am rubbish at giving directions) and then found he had no job to do once he got there, he refused to charge any call out fee and offered my husband advise that would mean we could fix things ourselves next time.
I called him last Friday afternoon about a blocked kitchen drain, he came around first thing on Saturday morning and the problem was resolved within half an hour.
Dave is fast, efficient, very fairly priced and just a very nice guy. We feel very secure knowing if our drains start messing around we will have Dave to help us out.