If your sink is blocked in Forthay, Gloucestershire then there are a number of methods you can use to clear the blockage. Firstly try using a plunger or bend as these provide enough pressure to break up any basic clog without having to resort other more dramatic solutions such as chemicals or snakes. If this does not work than pour some boiling water down the plughole and wait for it to do its job by breaking off small parts of larger build-ups near your drain before attempting further steps. You could also consider using vinegar mixed with baking soda which should be allowed time tom bubble away at any substances blocking things below until they diminish in size greatly allowing them through normally again; however make sure that combining an acid like vinegar with something alkaline like baking powder isn't causing corrosive reactions anywhere! Furthermore, if neither of those works shifting stubborn debris might require one last go around involving snaking devices - mechanical means used inside drains themselves available from most hardware stores but make sure you know what type best suits your particular issue when shopping online so choose carefully according yo their descriptions