I'd like to recommend Andy the plumber on 07983 688 451. Recently I had a problem with my toilet cistern siphon. Various DIY shops and 3 Plumbers suppliers could not identify the manufacturer or find a replacement. They all told me I had to take the toilet apart to fix it! Andy quickly identified the siphon and easily found an exact replacement online which I was able to install myself. Thanks to Andy's expert knowledge I saved a lot of money and hassle.