Hi Carry,
This has been asked on the forum on a regular basis, so apologies for the short response:
You can ask for their resignation, You hold a vote of no confidence, but none have any legal effect and if the Chair wants to stay in place, then they can do so.
If councillors spoke to the chair discreetly and asked, this might help the Chair find a quiet way out, rather than an a very public attempt to oust the Chair, that legally would fail, unless the Chair decided to walk away.
Never underestimate the determination of a Parish chairman to try hold onto their position!