British opposition Labour Party leader Jeremy Corbyn leaves his home in London, Britain, April 3, 2019. REUTERS/Henry Nicholls

LONDON (Reuters) - Prime Minister Theresa May will not set preconditions when she begins talks aimed at breaking the Brexit deadlock with opposition Labour Party leader Jeremy Corbyn on Wednesday, her Brexit minister Stephen Barclay said.

May said on Tuesday she would seek another Brexit delay to agree an EU divorce deal with Corbyn, a last-ditch attempt to break an impasse over Britain’s departure that enraged many in her party.

“We are not setting preconditions but nor is it a blank cheque,” Barclay told BBC radio.

“What we are saying is let’s sit down, in the national interest, businesses up and down the country are saying we need to end this uncertainty, we need to respect the referendum result,” Barclay said.

The minister added that he did not personally think a customs union was desirable.