Sir Mo, who was born in Somalia, was among the loudest voices of opposition to the order from Trump, signed on January 27, which banned people from seven Muslim-majority countries - Iran, Iraq, Libya, Somalia, Sudan, Syria and Yemen - from being granted entry to the US for a 90-day period.

He had initially feared he would be unable to return home before the British Foreign Office clarified the 33-year-old, who is part of the 5,000 metres field in Birmingham, and others in his position would only be affected if travelling to the US from one of the countries specifically targeted.

In a statement issued following Trump signing the executive order, which has since been blocked by the courts, Sir Mo claimed the American President had made him an "alien".

Speaking before he competes in the 5,000m at the Indoor Grand Prix at the Barclaycard Arena, Sir Mo described the order as "crazy and unfair" while admitting he is still concerned about what will happen when he travels to the US to return to his home in Portland next month.

"They have made changes for people like me but the hard part was living in the US for six years and going to a training camp and hearing the news I can’t go back and see my kids," he said. 

"That was scary and it was important for me to speak out as there are a lot of innocent people out there who couldn’t say anything.

"Yes, I’ve had issues before.

“Hopefully it will be fine, and I always try and look on the bright side of life. 

"But I go back in March and see my family and at that point we will see.”

Going into the event, Sir Mo told a press conference today that he thinks tomorrow will be "my last track race indoors" before retiring later this year.

Sir Mo is one of the leading names due to compete at the Indoor Grand Prix in Birmingham, the final stop on the IAAF World Indoor Tour campaign.

He will be hoping to recover from his disappointing seventh-place finish at the Edinburgh Cross-Country event last month.

Asian record-holder Albert Rop of Bahrain and Morocco’s Olympic steeplechase fourth-place finisher Soufiane El Bakkali are among the athletes expected to provide the greatest challenge to the Briton.

Double Olympic champion Elaine Thompson of Jamaica, winner of both the 100m and 200m races in Rio de Janeiro last year, is poised to make her first IAAF World Indoor Tour appearance of the season and she will be the clear favourite in the women's 60m event.

World indoor champion Barbara Pierre of the US, Jamaica’s Gayon Evans and Norway’s Ezinne Okparaebo will battle for the overall World Indoor Tour crown in the 60m race.

The men's 400m is also likely to provide a thrilling conclusion to the race for overall glory, with two-time world indoor champion Pavel Maslák of the Czech Republic and Grenada’s Bralon Taplin are currently tied on points in the standings after exchanging victories in Dusseldorf and Torun.