The UK has been temporarily spared from US President Donald Trump's executive order doubling steel and aluminium tariffs from 25% to 50%.
The order signed by Trump on Tuesday evening raises import taxes for US firms buying from other countries from Wednesday - but the levy remains at 25% for the UK.
The order depends on the UK and US tariff pact signed in May, which would axe steel and aluminium tariffs but has yet to come into force, meaning UK steel exporters will face tariffs until then and could face the 50% tariff if the pact falters.
The UK government said it is "committed to protecting British business and jobs", but the Conservatives said the order was a "fresh tariff blow".