If you have a blocked sink in Deerhurst, Gloucestershire then the first step is to check whether it is possible to unblock using some common methods such as boiling water or using vinegar. If these don't work try using a plunger or if that fails use an old method of hooking something formed like a bent coat hanger with wire cutters into the plughole and rapidly pulling out any blockages. Another option would be to get yourself down one of those bottles used for clearing sinks from most DIY stores which contains various chemical solutions known widely as Sink Un Blocker'. You may also want to consider purchasing (or hiring) what we call the snake - essentially this looks like cupped tongs on something resembling fishing line - but whatever route you take just make sure not waste time trying multiple processes before moving onto another approach so good luck!