If your sink is blocked in Upper Wick, Gloucestershire there are a few methods that you can try to unblock it yourself. The most common method of clearing blockages involves using a plunger - fill the sink with enough water and work the plunger vigorously over each plughole several times until full suction is achieved. If this doesn't clear the blockage then another effective measure is to use a bent wire coat hanger or snake device as these tools may be able to reach into other sections of pipework beyond what you would be capable with just your hand alone! You could also try pouring boiling water down both sinks simultaneously but make sure not to fill up too much otherwise liquid will overflow and create mess inside your home. Start by half filling one side first before attempting on both sides at once if necessary! Finally, an old wives' tale arises from mixing vinegar and baking soda together however we caution anyone against trying this step without prior knowledge/awareness because for certain substances when mixed together they become highly corrosive chemicals which themselves need disposing off safely afterwards please proceed carefully here as incorrect usage might result in further damage being caused unintentionally.