Thanks for the replies above. I think the Tickly T has the answer. We had an ensuite built when we moved in 19 years ago. I am jsut surprised that we have not had the need to chage a washer on the cold taps in that time. Looks like the hot water has to be drained. Never mind. Thanks gents.
I am attempting two jobs in an ensuite bathroom. They both involve turning off the cold water supply. As far as I am aware the cold water feeds from the loft based tank (interestingly, made of slate).
I have turned off three different taps:-
1) Stop cock.
2) Feed from the tank in the loft...