The engineer turned up within the specified time scale. He quickly resolved the issue we had with the stop cock. Although he was unable to remove the old kitchen sink taps as they were stuck with limescale and I was going to remove the sink anyway. he left me loads of advice and a few bits of hardware along with the assurance of if I got into any difficulties removing the kitchen sink, plumbing force would be happy to help even on a Saturday. We had a plumber from a different company earlier that day and basically said he couldn't do the job because it involved lead pipe work, but the plumbing force guy sorted it for us and got our water supply back on. Which made me very happy.