Steve Witkoff, sitting opposite the Ukrainian leader, told reporters the US team felt "encouraged" by what he called a "substantive" and important discussion.

Policing Minister Sarah Jones told the House of Commons the disorder on Sunday night was "intimidating and thuggish" and warned "those who cross into illegality" would "face the full force of the law".

The protests followed a large group of masked men holding a demonstration over small-boat crossings at the Port of Dover on Saturday, causing major disruption.