The phrase "controversial resignation" refers to a situation where someone leaves their position in a way that sparks disagreement or debates among people due to the circumstances or reasons behind their departure. Full definition
Theresa May received # 35,000 for her leadership campaign from two Tory donors at the centre of David Cameron's controversial resignation honours list. (politicshome.com)
She also targeted Sir Craig Oliver the former No10 spin doctor who was knighted in David Cameron's controversial resignation honours list. (thesun.co.uk)
She has worked in his constituency for more than 11 years and was among 46 of his aides and allies handed a CBE in his controversial resignation honours list. (totalpolitics.com)