Ireland’s foreign minister dismisses request by DUP in escalating row over trade barriers in Irish Sea.

Northern political leaders face major challenge after striking deal.

Arlene Foster tells incoming prime minister the £1bn-plus confidence and supply agreement must be renewed ‘over the coming weeks’.

Downing Street has said the post-Brexit Northern Ireland Protocol cannot continue in its current form and that it should be “urgently” changed.

Lords committee warns uncertainty over trading rules may add to economic damage of crisis.

Foreign minister challenges Johnson’s claim about goods moving from Northern Ireland to Britain.