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Three anti-Brexit parties have agreed a ‚Remain alliance‘ pact to step aside for each other in 60 seats across England and Wales.

The Liberal Democrats, Plaid Cymru, and the Greens have made a decision brokered by cross-party group Unite to Remain to give each other’s candidates a clear run against candidates from other parties in December’s general election.

The Conservatives are currently on course to win the election, with a YouGov poll conducted earlier this week placing the Conservatives on 38%, Labour on 25%, the Liberal Democrats on 16%, and the Brexit Party on 11%.

Heidi Allen, who co-founded Unite to Remain, said: „With a single remain candidate in 60 seats we will return a greater number of remain MPs to parliament.“

Three anti-Brexit opposition parties have announced plans to step aside for each other in dozens of seats across the country, in a move which could prevent Boris Johnson’s Conservative Party from winning the UK general election.

The Liberal Democrats, Plaid Cymru, and the Greens have agreed to step aside for each other in 60 seats across England and Wales in the general election. 49 of those seats are in England while 11 are be in Wales.

In England, the Liberal Democrats will have a run at 40 seats, including London target seats Bermondsey & Old Southwark and Finchley & Golders Green. The Greens will have a clear run at nine seats, including Brighton Pavilion and the Isle of Wight.

In Wales, the Greens will have a clear run at one seat, while the Liberal Democrats will run in three and Plaid Cymru seven.

The agreement, which was brokered by a cross-party group called Unite to Remain, does not cover Labour, which will stand candidates in all seats at the December 12 election.

Unite to Remain’s Peter Dunphy told Business Insider that the group had approached the Labour Party about possibly working together but was „heavily rebuffed“ by members of Jeremy Corbyn’s Shadow Cabinet.

The agreement is significant because it could prove to be a decisive factor in marginal seats where Remain voters could split their vote between different candidates, and because previous cross-party attempts to co-ordinate Remain pacts have failed.

Member of Parliment Heidi Allen, who chairs Unite to Remain, said the December election was the last chance for anti-Brexit parties and campaigners to keep the UK in the European Union.

„They [the parties] know this general election is the last chance to change the path that this country is currently on,“ she said at a press conference on Thursday morning.

The Conservatives are currently on course to win the election, with a YouGov poll conducted earlier this week placing the Conservatives on 38%, Labour on 25%, the Liberal Democrats on 16%, and the Brexit Party on 11%.

The template for Unite to Remain’s plan was the Brecon and Radnorshire byelection in Wales in August, where the decision by the Green Party and Plaid Cymru to stand aside for the Liberal Democrat helped to overturn the Conservatives‘ majority of 8,000 and install a Remain candidate.

Most of the candidates given a free run will be Liberal Democrats, which had 20 MPs when parliament was dissolved on Tuesday. The Greens had one MP while Plaid had four.

Heidi Allen Heidi Allen

Allen, the former Conservative MP who defected to the Liberal Democrats, co-launched Unite to Remain and said the level of cross-party co-operation was „unprecedented in modern British political history.“

„With a single remain candidate in 60 seats we will return a greater number of remain MPs to parliament,“ she told the Guardian.

„This is our opportunity to tip the balance of power away from the two largest parties and into a progressive remain alliance.“

Jo Swinson, the Liberal Democrats leader, said: „We are delighted that an agreement has been reached. We would like to thank Unite to Remain for making this possible.

„This is a significant moment for all people who want to support remain candidates across the country.“

However, some anti-Brexit campaigners are concerned that in a handful of seats, Unite to Remain could help the Conservatives win by taking votes from Labour MPs who support holding a new referendum and staying in the EU.

These seats are Exeter, Stroud, Portsmouth South, and Cardiff Central. All four seats are currently held by Labour MPs who support a „People’s Vote“ and reversing the decision to leave the EU.