Thanks for that.
The cistern has now stopped leaking of it's own accord.
The stop cock has stepped it up a notch. As I don't have the tools to get sufficient leverage on the stop cock to tighten the packing nut I will probably have to call a plumber. Either that or cut out the partition...
My plumbing problems like to come in pairs...and just bfore I sell the house too!
I have two problems at present.
1. I have an Ideal Standard toilet with a torbeck valve in it which is not working. The cistern currently overflows and pours water down the outside of the house. To stop...