Congressmen say no free trade deal if UK breaks Good Friday Agreement for Brexit

A bipartisan group of members of the US Congress, which is housed in the Capitol building shown, have warned Boris Johnson against breaching the Good Friday Agreement as part of Brexit (J Scott Applewhite/AP)

Senior US politicians have warned Boris Johnson that Washington will not support any free trade pact with the UK if Britain fails to uphold its commitments to Northern Ireland as part of Brexit.

The UK Internal Market Bill cleared its first Commons hurdle on Monday despite deep misgivings by some senior Tories, with amendments to the Northern Ireland provisions expected to emerge in the Commons next week.