Jeremy Corbyn is to call on socialists across Europe to unite and take on the growing threat from the far right. In a speech in Prague, Czech Republic, tomorrow the Labour leader will say populist "siren voices" offer the wrong solutions to the problems facing working people. Addressing the Party of European Socialists Council, Mr Corbyn will warn events like Brexit and Donald Trump ‘s election show "the populist right is gaining ground". “In many cases the populist right do identify the right problems, but their solutions are the toxic dead ends of the past," he will say. “They are political parasites feeding on people’s concerns and worsening conditions, blaming the most vulnerable for society’s ills instead of offering a way for taking back real control of our lives from the elites who serve their own interests. “But unless progressive parties and movements break with a failed economic and political establishment, it is the siren voices of the populist far right that will fill the gap.” Read More Donald Trump and Brexit top Yahoo’s list of most popular web searches for 2016 Mr Corbyn arrived tonight at the conference, where he appeared at a group event with Czech Prime Minister Bohuslav Sobotka. He is due tomorrow afternoon to visit the Terezin Memorial, a former Nazi concentration camp where more than 35,000 died. Inviting leaders to an alternative Brexit summit in February, Mr Corbyn will renew a warning to Theresa May to guarantee the future of EU citizens living in Britain – and not use them as "bargaining chips". He will add: “Socialist and progressive parties across Europe should work together to find the best possible solution that benefits both Britain and the EU in the Brexit negotiations."