Good evening all! I am hoping you can help me. I am renovating my bathroom and fitting a new suite. I have removed the old fittings and noticed a slow leak at a compression joint to the sink cold water pipe below the floor. This is an old fitting and I believe is over tightened as there is absolutely no give. I have disassembled and reassembled but no improvement so I assume the olive has failed. The application of leak seal on the male thread doesn’t help. So I think I need to fit a new elbow but - as you can see from the photo - the pipe sits on top of a waste stack with a hot water pipe above it so I can’t really get a pipe cutter in and - even if I could - there is probably only a few centimetres of copper pipe left to actually cut between the failed joint and the soldered t joint that comes off the fixed main pipe. I am an experienced DIYer and normally ok with the pipe work basics but this is nothing I have ever tackled before. Any ideas as to how I fix this? All advice will be greatly appreciated!