If your sink is blocked in Lynch, Gloucestershire then you will need to call an experienced drain specialist. The most common methods for unblocking a sink are using either boiling water or a plunger to dislodge the blockage. You can also use vinegar and baking soda mixed together as this acts like an abrasive when poured down the plughole which sometimes works if the blockage isn't too deep within pipes but always proceed with caution as depending on what type of pipe household cleaning chemicals may damage them! Additionally, it's worth trying older tried and tested kitchen remedies such as using Coca-Cola instead, before seeking professional assistance from drainage experts who have specialized equipment that removes blocks behind bends or further down into joints which often causes back-up issues internally at home - these include snakes (though there are now more modern alternatives) where specialised technicians rotate metal rods around bends backed up with high pressure jets capable of clearing even difficult obstacles ensuring peace of mind knowing drains remain cleared long term.