London (AFP)

British Labor Party boss Jeremy Corbyn on Tuesday reunited the other opposition leaders to try to stand together against a brutal Brexit on October 31, envisioned by Prime Minister Boris Johnson.

Labor, the main opposition group, will do "all that is necessary" to prevent an exit from the EU without agreement, Jeremy Corbyn told The Independent newspaper before the meeting, scheduled in his office in Parliament in London.

He also warned of the risk of a "no deal" favorable to US President Donald Trump who, ardent defender of an uncompromising Brexit, promised Johnson "a very large trade deal, quickly" after the withdrawal.

But a Brexit without agreement "will not give us back our sovereignty, it will put us under the yoke of Trump and big American companies," worried the leader of the opposition.

- Interview with Juncker -

Boris Johnson desperately wants to leave the EU, with or without a divorce agreement, dividing the UK deeply, even into his conservative camp, some of whom want to maintain close ties with the EU. A brutal break also raises fears of food shortages, fuel and medicine, as well as the reinstatement of tariffs.

The head of government said Monday "barely more optimistic" about the possibility of agreement with Brussels after the G7 summit. London and the EU oppose the fate of the future Irish border, which will separate the United Kingdom from the European single market, while being ready to discuss it.

Johnson will hold talks with European Commission President Jean-Claude Juncker on Tuesday while his advisor, David Frost, will be in Brussels for talks on Wednesday, according to a spokeswoman for EU executive Mina Andreeva.

Jeremy Corbyn believes that early general elections would be the best way to thwart a Brexit without a parachute. He wants to bring down the executive in a vote of no confidence after the return of the Parliament, on September 3, and take the lead of an interim government with the aim of pushing the date of Brexit.

Labor would then campaign for a new referendum on EU membership, which would mention the possibility for the UK to remain a member.

A scenario rejected by the head of Liberal Democrats Jo Swinson, who attended the meeting alongside MPs Ian Blackford (Scottish nationalist SNP party), Liz Saville-Roberts (Welsh party Plaid Cymru), Caroline Lucas (Greens) and the ex-Tory Anna Soubry (independent).

None of the pro-European conservatives invited responded to the invitation, each of them unwilling to see Labor gain power.

- The absence of agreement, "only acceptable agreement" -

For Ms. Swinson, Jeremy Corbyn's project is indeed doomed to failure, the latter is not, according to her, the person capable of building a majority.

"The seemingly growing support option" is the passing of a law requiring the government to request a new Brexit postponement, she said on the BBC radio. "But we should of course discuss all the options, including what to do if it does not succeed, because we do not have much time," she added.

In the United Kingdom, the government has its hand on the parliamentary agenda. And Boris Johnson did not rule out the possibility of suspending Parliament to prevent MPs from blocking a "no deal".

The British decided 52% to leave the EU in a referendum in 2016, but the date of departure was already postponed twice after the Parliament opposed the agreement between Brussels and the government British, then led by Theresa May.

For its part, the Brexit Party, led by europhobic MEP Nigel Farage, has put itself in order by presenting Tuesday its candidates for possible parliamentary elections.

"The + no deal + is the best deal, the only acceptable deal," Farage said as he was applauded by hundreds of candidates in London. The party came first in the European elections in May.

© 2019 AFP