Neil Carmichael, who represented Stroud constituency from 2010 to 2017 has urged voters to ‘deny the Conservatives’ a majority so the UK can rethink its approach to Brexit.
Mr Carmichael was defeated in Stroud by Labour’s David Drew by just 637 votes in 2017.
The two former rivals had stood against each other in five general elections, with Mr Carmichael winning in 2010 and 2015.
Now Mr Carmichael is urging voters not to back his former party.
In a video published on Monday, Mr Carmichael said: “I believe passionately that we must stop a Conservative majority. That’s because I think we need to rethink our approach to Brexit.
“We should have a people’s vote and should make sure that we have the best future for our country in terms of international connections, trade and social diversity and in terms of the unity of this great country of ours.
“We must at all costs use our vote sensibly and tactically to make sure we get a better result for our future.”
The video was published in support of Dominic Grieve’s campaign in Beaconsfield where he is standing as an Independent Candidate.
This comes after 15 former Labour MPs urged the public not to vote for Labour leader Jeremy Corbyn in an open letter this morning.
The SNJ has contacted Stroud Conservatives for a response to Mr Carmichael’s comments.
The latest YouGov poll is also predicting that Labour’s David Drew will retain his seat in Stroud with a 48% majority, with Conservative Siobhan Baillie currently predicted to take 44% of the vote.