By Greg Heffer, political reporter in Bournemouth
Former Conservative leadership contender Sam Gyimah has defected to the Liberal Democrats on the first day of the party's conference in Bournemouth.
The ex-universities minister was revealed as the Lib Dems' 18th MP at a Saturday evening rally, telling party members he had joined to "help create a new force in British politics".
"I want to make a difference, I want to serve my country," Mr Gyimah said.
He added: "I have taken a second look at the Lib Dems and I am delighted to be here to embark on this journey at this point in time with you."
Mr Gyimah becomes the third former Conservative MP to have joined the party in the last month, with three ex-Labour MPs also having joined the Lib Dems this year.
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The East Surrey MP had put himself forward as a candidate for the Conservative Party leadership as recently as June.
He advocated a second EU referendum but withdrew from the race eight days later and before the first ballot of Tory MPs.
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Mr Gyimah was this month effectively expelled from the Conservatives along with 20 of his colleagues, having the party whip removed after voting against the government on Brexit.
The rebel group had supported legislation that will compel Prime Minister Boris Johnson to seek a fresh three-month delay to Brexit if he fails to negotiate a new withdrawal agreement with the EU by 19 October.
Conservative whips recently offered a route back into the party fold for the 21 rebels by writing to each of them to set out an appeals process.
But Mr Gyimah revealed, on a podcast he co-hosts with fellow former Tory minister and now Lib Dem MP Phillip Lee, that he would be rejecting the offer.

He said on the podcast, published on Friday: "I have said, given the letter I received, that I am not going to be accepting the whip back because the policy hasn't changed.
"So I will be reflecting very deeply on what I do next this weekend."
Mr Gyimah revealed at Saturday's rally how he recently approached Liberal Democrat leader Jo Swinson with a plan to stand as an independent at the next general election, suggesting the Lib Dems might not run against him in his seat.
But Ms Swinson rejected his proposal, telling Mr Gyimah, as he recalled: "I'm in the business of creating Lib Dem MPs, not offering Conservatives a way back."
At this point, Mr Gyimah revealed, the conversation "got really interesting" as they discussed his possible defection.
At their conference in Bournemouth, Lib Dem members will vote on whether to support the outRead More – Source