European Union bureaucrats are demanding that “current and future family members” of European nationals in the UK should have an open-ended right to settle in this country after Brexit.

They also want Britain to continue to agree to pay the pension costs of Brussels bureaucrats after Britain leaves the EU in March 2019.

The demands are made in two negotiating papers which have been published by the EU ahead of formal Brexit talks starting on June 19, just 11 days after next Thursday's general election.

Theresa May, the Prime Minister, will today condemn them as “aggressive” and stress that she is better placed to negotiate Britain’s exit from the EU.

The document, titled “Essential Principles on Citizens’ Rights” says that “family members … will join the holder of the right at any point after the date of entry into force of the withdrawal agreement”.

It then adds that this will apply to “current and future family members”, which makes the commitment potentially open-ended over generations for decades.

EU nationals will also receive an identity document giving them, their wives and husbands and children the right to remain in the UK.

Another document, entitled “Essential Principles on Financial Settlement”, sets out the scale of the bill the EU wants Britain to pay to leave the EU.