Thanks to all comments received with the last 1/2 hour. I hate being easily defeated but cistern is beyond us, even though it’s easy peasy. I have a report to right and no time for You Tube. Anybody out there have the name of a good plumber who is a. Available as soon as but who b. Doesn’t charge the earth for what is undoubtedly a straightforward job? Thank you for your neighbourliness!