Theresa May has written to the EU to request a further delay to Brexit until 30 June.
The UK is currently due to leave the EU on 12 April and, as yet, no withdrawal deal has been approved by MPs.
Mrs May has proposed, if UK MPs agree to a withdrawal deal in time, the UK should be able to leave before European Parliamentary elections on 23 May.
But she said the UK would prepare to field candidates in those elections, in case they do not reach an agreement.
The prime minister wrote to European Council President Donald Tusk to request the extension ahead of a summit of EU leaders next Wednesday.
She requested an extension to the end of June at the last summit, which took place shortly before 29 March – the date the UK was originally meant to have left the EU.
But she was offered a short delay to 12 April – the date by which the UK must say whether it intends to take part in the European Parliamentary elections – or until 22 May if UK MPs had approved the withdrawal deal negotiated with the EU. They voted it down for a third time last week.
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