Brexit Secretary David Davis said Sunday Britain will not honour financial commitments agreed this week with the European Union if they fail to secure a future trade deal, contradicting finance minister Philip Hammond. 

"No deal means that we won't be paying the money," he told the BBC.

"It is conditional on an outcome. It is conditional on getting an implementation period, it is conditional on a trade outcome," he said.

"It has been made clear by number 10 already. So that's not actually new," Davis added, referring to the Downing Street office and residence of British Prime Minister Theresa May.

Under an initial agreement reached with the EU on Friday, Britain will pay a financial settlement of between £35 billion-£39 billion (40-45 billion euros, $47-52 billion) for leaving the bloc in March 2019.