JEREMY Corbyn was heralded by leftie EU leaders yesterday as “the new Prime Minister of Britain” as they thronged to meet him in Brussels.

The Labour leader is the only left wing boss in Europe to make big gains in an election this year as others in Germany, France and the Netherlands slumped.

2 Jeremy Corbyn was heralded as 'the new Prime Minister' by leftie EU leaders during his trip to Brussels Credit: AP:Associated Press

Once ostracised, Mr Corbyn was given top table access to a series of Socialist prime ministers.

President of the European Parliament socialists group Gianni Pittella heralded him as the UK’s actual leader as he introduced him before a speech.

The Opposition boss also met the EU’s chief negotiator Michel Barnier for an hour of talks, as well as MEPs’ president Antonio Tajani, and the Italian, Swedish and Portuguese premiers.

Yesterday’s warm welcome came in stark contrast to Mr Corbyn’s trip to Brussels last year where he struggled to be seen by any national leader.

2 During Corbyn's time in Brussels he met the EU’s chief negotiator Michel Barnier and MEPs’ president Antonio Tajani, and the Italian, Swedish and Portuguese premiers Credit: AP:Associated Press

Mr Corbyn told a conference: “Although we did not quite win the general Election, we comprehensively proved our critics wrong, delivering the largest increase in Labour’s votes since 1945”.

But he also drew controversy by refusing to say whether he would honour the terms of any Brexit deal struck by PM if he succeeded her.

Mr Corbyn's visited the Belgian capital to put pressure on Mrs May over Brexit.

But senior Tory MP Anna Soubry mocked him, saying: “Seriously? The biggest thing Corbyn's negotiated is who's speaking first at the Islington Labour Party AGM”.