Mr Benton had the Tory whip withdrawn earlier this year and sits as an independent.
In a meeting with newspaper reporters posing as gambling industry investors, he was caught offering to lobby ministers and table parliamentary questions.
Mr Benton currently has a majority of 3,690, making his seat a top general election target for the Labour Party.
The Conservatives are already facing a potential by-election in Wellingborough next year, after the suspension of former Tory MP Peter Bone over bullying and sexual misconduct allegations.
A report by the Commons Standards Committee said Mr Benton had given the message âhe was corrupt and âfor saleâ and that so were many other Members of the Houseâ. It said he âcommunicated a toxic message about standards in Parliamentâ and his comments âunjustifiably tarnish the reputation of all MPsâ.
In a letter to the committee, Mr Benton said: âI do not consider my actions to be a breach of the rules: it is my view that I complied with the letter and the spirit of the rules.â (1)
Well, he would say that wouldnât he - itâs the Tory Party âpartyâ defence âŠ