Britain leaving the European Union will take longer than had initially been thought, the President of the European Commission has said.

Speaking in Luxembourg, Jean-Claude Juncker said the UK would “have to pay” the Brexit divorce bill before negotiations could move onto the next phase.

The president’s comments come after EU negotiators warned that talks on the payments had reached a “disturbing deadlock” this week.

Barnier: The Brexit agreement will not be based on concessions

“The British are discovering, as we are, new problems every day. That’s the reason why this process will take longer than initially thought,” said Mr Juncker.

“We cannot find for the time being a real compromise as far as the remaining financial commitments of the UK are concerned. As we are not able to do this we will not be able to say in the European Council in October that now we can move to the second phase of negotiations.

“They have to pay, they have to pay, not in an impossible way. I’m not in a revenge mood. I’m not hating the British.”

After Theresa May triggered Article 50 in March the UK has two years to negotiate a departure settlement with the EU before it crashes out of the bloc in March 2019.

David Davis (L) and Michel Barnier (R) at a joint press conference (EPA)

Negotiations so far have been slower than expected, with hopes that the UK would reach a key milestone by the time of the European Council meeting next week now evaporated.

The EU is insisting that both sides make headway in settling “separation” issues – what will happen to the Northern Ireland border, the divorce bill, and EU citizens living in the UK – before trade talks can take place.

Brexit: the deciders Show all 8 1 /8 Brexit: the deciders Brexit: the deciders European Union's chief Brexit negotiator, Michel Barnier Getty Brexit: the deciders French President Emmanuel Macron Getty Brexit: the deciders German Chancellor Angela Merkel Reuters Brexit: the deciders Commission President Jean-Claude Juncker EPA Brexit: the deciders The European Parliament's chief Brexit negotiator Guy Verhofstadt Getty Brexit: the deciders Britain's Prime Minister Theresa May Getty Images Brexit: the deciders Britain's Chancellor of the Exchequer, Philip Hammond PA Brexit: the deciders After the first and second appointed Brexit secretaries resigned (David Davis and Dominic Raab respectively), Stephen Barclay is currently heading up the position PA

The UK, however, believes this framework is too strict, and in particular wants to discuss transitional arrangements before these issues are considered.