I have been through all of the NHS procedures with regard to the above. My next option was a mesh or some other medical intervention. By chance I purchased a ‘rebounder’ trampet around 18 months ago. After two weeks of bouncing around 30 minutes per day I noticed the urgency and leaks had reduced significantly. I now use it around 40 mins per week to maintain the benefits gained.
Hope that helps. PS Mine has bungee ropes not springs so nice and quiet.