Donald Trump has spoken of the 'great honour' of being hosted by his 'friend' King Charles - but got his title wrong.

Speaking before taking off on Air Force One, the US president praised the monarch ahead of a state visit this week.

He said King Charles and Queen Camilla had been friends with him for a 'long time'.

But he addressed the monarch incorrectly, calling him 'Prince Charles'.

Mr Trump also hinted at possible tariff relief for UK steel.

He said he was 'into helping' Britain on fine-tuning the UK-US trade deal as the Government seeks to eliminate tariffs on British steel imports to the US.

He is expected to land in the UK this evening, Tuesday, September 16, for his unprecedented second state visit.

There was speculation Mr Trump would stay overnight at the US ambassador's

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