The order raises import taxes for US-based firms buying from other countries from today - but the levy remains at 25% for the UK.

U.S. President Donald Trump's 50% tariffs on most imported steel and aluminum went into effect on Wednesday, an increase from previous 25% rate that had been in place.

Cars, cans and coffee tins are all poised to get more expensive, as 50 percent tariffs on steel and aluminum take effect.