I'd had a partially blocked toilet since before Christmas (still functioning but despite my efforts obviously not clearing. I rang Darren's number on Tuesday 24 January and got his answering machine. He rang me back that evening and arranged to come the following day at a time that suited me. He arrived very punctually and cleared the blockage, without using his pressure hose, in about 20 minutes. He then spent a further 10 minutes or so making quite sure the toilet was flushing properly and the blockage had gone. He had quoted for the job on the 'phone, and I thought his charge reasonable (nothing's cheap in London!). I would definitely recommend him and would use him again if necessary.