A council leader was threatened with formal action during a tumultuous meeting after her call for Cambridgeshire’s under-fire mayor to resign was dismissed. Mayor Dr Nik Johnson called on Cllr Anna Bailey to retract public comments that had “cast aspersions” against him as a practising doctor. Labour’s Dr Johnson warned that if she did not, he would be left with no alternative than “to move towards formal action” against her. The exchange came as Dr Johnson faced the Cambridgeshire and Peterborough Combined Authority board members for the first time since he was found to have breached the mayo…