Sir Michael Fallon has warned Boeing that its behaviour in a trade dispute with Bombardier "could jeopardise" its future defence contracts with the Government.

The Defence Secretary made the warning after a ruling was made in the US to impose punitive tariffs on the plane maker Bombardier, one of Northern Ireland’s biggest employers.

Downing Street said Theresa May supported Sir Michael's comments and that she was "bitterly disappointed" by the decision.