- I called Mark because my bathroom sink was leaking after I knocked the waste pipe removing old tiles. Mark came over to have a look at it and gave me advice on how to fix the leak and parts I needed to do so. The advice was spot on and the leak was soon fixed and he didn't even charge me for his time. Can't rate Mark highly enough, he's done several jobs in my house including installing a new boiler. Would recommend him and his company to anyone.