The initial proposals from these big countries encourage the break-up of the Union
But today Mr Kaczynski blasted: “The initial proposals from these big countries encourage the break-up of the Union.
“We cannot stand idly by and let the most powerful ones carry on like this. We cannot allow the Union to fall apart.
“Britain is being treated arrogantly today, which is a hysterical reaction.”
Addressing delegates, the 67-year-old was also keen to leave the door open for a possible return to the European fold for Britain.
Far from punishing Britain for voting to leave, instead he urged Brussels to “reach out” to the next Government and try to smooth over future relations.
Urging Brussels bureaucrats not to burn bridges, he pleaded: “We have to give it a chance, a chance of returning.”
His comments come amid growing confusion in Brussels over the best way to approach negotiations with post-Brexit Britain.
EU Commission president Jean-Claude Juncker and Mrs Merkel are locked in a bitter power struggle over the way forward after the chief Brussels bureaucrat banned any of his officials from speaking to London before Article 50 is invoked.
Mrs Merkel has publicly toed the same line, but privately she is under intense pressure from powerful German industry chiefs to accommodate Britain, which is the number one customer for many of the country’s manufactured goods.