European Commission president Jean-Claude Juncker said the Irish backstop could be scrapped if all of its objectives are met.
UK representatives will only attend EU meetings where the UK has a significant national interest in the outcome of discussions.
Note the words "unless and until".
Geoffrey Cox and Brexit Secretary Stephen Barclay travel to Brussels for talks ahead of next week’s crucial Commons vote.
A Leave supporter, Barclay has been catapulted to the Cabinet spotlight in a role potentially crucial to Theresa May's political survival.