Hi. I have a radiator that has sprung a leak at the base. It is dripping quite badly. Unfortunately, my usual plumber has gone on holiday and I have no real diy experience. I have closed what I believe is the lockshield valve (removed the white cover and turned the spindle clockwise with pliers until it was tight). The other valve is a honeywell trv for which I do not have a decorator cap. I closed the trv down to zero expecting the flow to at least slow, but after several hours it still seems to be dripping at the same rate. I have read that trvs remain open for frost protection, but this seems unlikely as it is not that cold. Should this have worked? What else could I do? Should I try to get hold of a decorater's cap - if i can get one is it obvious how it goes on? Please help if you can, bit of a damsel in distress here.