Iain Duncan Smith has revealed he is "really sad" to see Ann Widdecombe join the Brexit Party.
The former Conservative Party leader said he was "very fond of" Ms Widdecombe, who announced in the Express that she was leaving the Conservatives to stand for Nigel Farage's new party in the upcoming European elections.
"I think she is a formidable force and I believe that the government has mismanaged that completely," Mr Smith told talkRADIO's Julia Hartley-Brewer.
"She is somebody that should have been in the Lords so she could continue her political career, but David Cameron refused to put her there."
Mr Smith continued to say that Ms Widdecombe was a "popular" figure in politics.
"She is a first class campaigner and incredibly popular among grassroots Conservatives," he added.
"I also think pretty popular amongst the public because she was in celebrity come dancing."