"We've pretty much laid all the text on both sides. We are now in a position of consolidating those texts, so if you like that's laying the foundations of the deal," Truss told an event by the Spectator magazine.

"Of course we'd like to make as much progress as we can in advance of the U.S. election ... so that we can try to realise the benefits as quickly as possible," she said, adding that U.S. Trade Promotion Authority is due to expire in the middle of next year "so that is an important point to reach an agreement by".

(Reporting by William James, writing by Elizabeth Piper; editing by Michael Holden)