A spokesman for Essex Police said: “A man who had been voluntarily interviewed in connection with an investigation into allegations of serious sexual assault has been told he faces no further criminal action.
“The investigation related to alleged incidents outside of Essex which are non-recent.
“We carried out thorough enquiries and supported a number of people who came forward, including offering the support of an independent sexual violence advisor.”
The spokesman added: “A file was presented to the CPS [Crown Prosecution Service] relating to other, non-sexual, offenses. After receiving advice from the CPS, the senior investigating officer decided there was insufficient evidence to proceed.”
In a post on the social network X on Thursday, Knight, who continues to sit in the Commons as an independent, said he had been “told that the second Police Investigation into me has been closed without an arrest.”
He has previously denied what he described as a “false and malicious accusation.”
Knight announced last year that he will stand down at the next election, saying his name had been “tarnished.”
