The Prime Minister will present Donald Trump with a traditional Scottish quaich when she meets him in the White House this week.

The gift of an engraved cup of friendship reflects the US President's Scottish ancestry as the son of of Mary MacLeod from the Isle of Lewis.

The two-handled bowls have been exchanged by Highland clan chiefs for centuries as a token of hospitality and a symbol of kinship.

Although they are traditionally used to drink whisky, Mr Trump is teetotal.

Theresa May will also present first lady Melania Trump with a hamper of produce from the Prime Minister's country residence Chequers, including apple juice, jam, marmalade and Bakewell tarts.

The Prime Minister will address a Republican Retreat in Philadelphia on Thursday evening, before meeting Trump later.

She will tell the retreat audience: "The leadership provided by our two countries through the Special Relationship has done more than win wars and overcome adversity. It made the modern world.

"The institutions upon which that world relies were so often conceived or inspired by our two nations working together.

"It is through our actions over many years, working together to defeat evil or to open up the world, that we have been able to fulfil the promise of those who first spoke of the special nature of the relationship between us.

"The promise of freedom, liberty and the rights of man."

In a media briefing, Downing Street wrongly told journalists that the name of the cup is pronounced with a hard K, when it is actually said with a soft "ch", as in "loch".