DONALD Trump’s wife Melania is to be at his side during the US President’s controversial visit to London next month, the Foreign Office have been told.

And the pair are set to be honoured by the British Army’s oldest and most prestigious regiment the Coldstream Guards when they arrive at Windsor Castle to visit the Queen.

3 Melania looks set to make it on Donald Trump's visit to the UK despite recent health worries and her absence at the G7 summit and on a visit to North Korea Credit: AP:Associated Press

Despite fears of mass-protests in the capital, the Trumps are likely to spend some time in central London — with British officials briefed the Trumps may stay at the US Ambassador’s residence Wingfield House.

There has been intense speculation about whether Mrs Trump’s whereabouts in recent months after she was noticeably absent during key moments such as the recent G7 meeting of world leaders in Canada.

The former model from Slovenia, 48, also raised eyebrows by swerving her husband’s historic summit in Singapore with North Korean leader Kim Jong Un.

She has been broadly absent from official First Lady duties since a kidney operation in May.

3 President Trump will be honoured by the British Army's oldest regiment, the Coldstream Guards seen here Trooping the Colour Credit: EPA

But last week she appeared with Mr Trump, who said his wife had been through “a little rough patch but she’s doing great.

"The people of our country love you. Thank you, honey.”

3 The Trumps will meet the Queen when they arrive at Windsor Castle Credit: Rex Features

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In the latest secret plans drawn up in Whitehall and Washington for the UK trip, Mr Trump will invited to inspect a hundred-strong Guard of Honour in a lavish welcoming ceremony in the historic courtyard of Windsor Castle.

Formed in 1650, the Coldstream Guards are Britain’s oldest regiment and have served in almost every major conflict since the Civil War.

They took a starring role in last week’s Trooping the Colour to celebrate the Queen’s birthday and guard Buckingham Palace and Windsor Castle in their distinctive red tunics and bearskin hats.

And Her Maj serves as the regiment’s Colonel in Chief.

Melania Trump seen for first time in almost a month as she attends private White House event