Reuters reports that European Union chief negotiator Michel Barnier resumed talks in London with his British counterpart on Tuesday as the two sides try to strike a last-minute trade agreement.

The United Kingdom left the EU in January but the two sides are trying to clinch a deal that would govern nearly a trillion dollars in annual trade before informal membership - known as the transition period - ends on Dec. 31.

There is very little time left to bridge significant gaps between Britain and the EU on sticking points in talks about a post-Brexit trade deal, Prime Minister Boris Johnson's spokesman said on Monday.