Britain and the European Union are heading into a “very significant” week, British foreign minister Dominic Raab said on Sunday, as talks over a trade deal enter their final days with serious differences yet to be resolved.

Axar.az reports that EU negotiator Michel Barnier told reporters in London that “works continue, even on Sunday” on his way to a negotiating session, as both sides look for a deal to prevent disruption to almost $1 trillion (752 billion pounds) of trade at the end of December.

“This is a very significant week, the last real major week, subject to any further postponement... we’re down to really two basic issues,” Raab told the BBC.