The hot tap in the bathroom (sink) has almost stopped working. I say almost, as when you turn it a dribble comes out which gradually slows down before stopping altogether. If you lift the 'handle' of the tap up a bit, it increases the flow for a couple of seconds but not much.
Any ideas what could be wrong with it? Does it sound like something that should be quite simple to fix or do I need a plumber? All other hot taps are working fine, its just this one.