K.

And you appear to be on the brink of a Brexit deal that will define their future relationship.

It's been more than 10 months since Britain formally exited the block and talks on a trade deal have gone to the wire, with the UK due to leave the single market and customs union at the end of the month.

Sources in London and Brussels that a deal was close as Prime Minister Boris Johnson had a late night conference school with his Cabinet of senior ministers and negotiators in Brussels pored over reams of legal text.

Key sticking points have bean you fishing rights in UK waters as well as how to ensure a level playing field for competition between the two sides.

A deal would avert the prospect of both sides imposing widespread import taxes come January, the first.

It will also cover issues such a security, transport and energy.

There's expected to be news conferences in Brussels and London on Thursday morning.