Hmmm, today I had a creak as well as a click.
The creak turned out to be the spokes on the back wheel, which were loose as a very loose thing I have a feeling it isn’t built for carrying loads (such as my big saddlebag), or for riding on cobbles (my road is cobbled). I’ve tightened it up / trued it, will have to see, it may be that this was also the source of the click too, but I don’t think it was.
I don’t think it’s a pedal, because it happens with either foot being pushed down. I checked chainrings & cranks are both jolly tight.
The cassette – what tools do I need to check that?
The BB, it appears to have an 8 splined fitting on the only bit I can see. Is something that fits that all I need to take it out? What is the tool that I need, some kind of spanner?
Joe