Dominic Raab has resigned after allegations he bullied staff members while working as a cabinet minister across different departments.
In a letter posted on Twitter, the deputy prime minister and justice secretary revealed a report into his behaviour upheld two claims against him.
But he took issue with the findings, calling them “flawed” and claiming they “set a dangerous precedent for the conduct of good government”.
It comes after the prime minister was presented with the findings of an official report into Mr Raab’s behaviour on Thursday.
Politics live: Raab ‘keeps word’ and quits
The deputy prime minister and justice secretary was appointed by Rishi Sunak after he took power in October.
Allegations surfaced about Mr Raab back in November, with former staff claiming he created a “culture of fear” in their departments.
He denied the allegations and requested an investigation into himself after two formal complaints were made.
As the weeks rolled on, more accusations came to light, with one report suggesting as many as 24 complaints had been made.
Mr Sunak has come under pressure over what he knew about Mr Raab’s alleged conduct, with a source telling political editor Beth Rigby the PM was informed about Mr Raab’s “unacceptable behaviour” before appointing him as his deputy and justice secretary.
Downing Street said Mr Sunak was “not aware” of any “formal complaints” about Mr Raab when he appointed him, but Number 10 did not deny concerns had been expressed informally.
Labour leader Sir Keir Starmer has previously accused the PM of ignoring reports about Mr Raab’s conduct.
Mr Raab’s departure follows Mr Sunak’s decision to dismiss Tory party chairman Nadhim Zahawi from his post in January after the former chancellor was found to have broken the ministerial code over his tax affairs.