I think this is actually pretty positive for democracy.
I agree. I was actually querying the use of the phrase "put the boot in".
Also don't forget that she can stand in the by-election, so were there sufficient of the just under three quarters who didn't sign the petition prepared to vote for her she'd be re-elected. That said I very much doubt that is going to happen in this case.
I think it is extremely likely that she was elected last time
because she was the official Labour candidate. People don't generally vote for a person, they vote for the person who represents the party they support. Fiona Onasanya doesn't represent Labour anymore. This recall election is entirely the right thing to do IMO.