Talks between Britain and the European Commission on Brexit have made progress in some issues but they still disagree on how to tackle the Irish border, according to the EU’s chief negotiator.

"We have advanced on some separation issues for which European businesses need certainty, such as customs, VAT, Euratom and certificates for goods," Michel Barnier said in a joint statement with the UK.

However, the statement said that "serious divergences" remained on "the protocol on Ireland/Northern Ireland," for which "a fully operational backstop solution" was required.

Mr Barnier said more work needed to be done before October, which is the target to finalise a withdrawal treaty governing the UK's departure from the EU.