The Cabinet Office investigation into Mark Field’s confrontation with a climate change protester has been dropped now that he is no longer a minister.
The Tory MP was suspended as Foreign Minister by Theresa May after he forcefully removed Greenpeace activist Janet Barker from a black-tie event at London's Mansion House.
When Boris Johnson became Prime Minister Mr Field lost his job in the Foreign Office and the investigation into whether he broke the ministerial code has now been closed.
According to Downing Street spokesperson Mr Johnson believed the issue should have been dealt with before he took office.
"The current PM considers this issue was a matter for the previous PM concerning his conduct during his time as a minister under her appointment," said the spokesman.
Footage of the protest showed Mr Field pushing Ms Barker, taking her by the back of the neck and escorting her out of the room as then-Chancellor Philip Hammond gave a speech.
Ms Barker said had said she was “shaken up" by the altercation. "I was armed with peer reviewed science - the message that we were giving out. That's all I was armed with," she said.
Mr Field was not expected to retain his government role after supporting Mr Johnson’s Tory leadership rival, former Foreign Secretary Jeremy Hunt.