Mohammad Tariq Mahmood, his brother, and nine of their children aged between eight and 19, was told at the airport that their "authorisation to travel on the flight had been cancelled without further explanation."
The family are not the first 'Muslims' travelling to the USA recently to find their travel plans hit at the last minute.
In other cases a US official, or officials, delivered the news to would be passengers at the airport; again without explanation.
To rub salt into Mr Mahmood's wounds he has now been told by his flight company Norwegian Air that the £9,000 cost of their flights to the USA will not be refunded.
There has been no follow-up contact with Mr Mahmood, his brother or children by US or UK officials-so if any or all of them pose a security threat how come?
Many are concluding that widespread condemnation of Trump's proposed ban on all Muslims travelling to the USA, is just hot-air and empty pacifying words.
Mr Mahmood told the Guardian he thinks he knows the reason they were stopped - "It's because of the attacks on America - they think every Muslim poses a threat."
I suppose not ordering an official blanket ban means the US can play host to Saudi Kings and Middle Eastern leaders when it suits but prevent many ordinary Muslims from travelling to the USA.
I imagine many Middle Eastern countries would like to ban US military personnel, John Kerry and other Americans from entering their countries too.
"Labour's Stella Creasy, who is the family's local MP, has written to David Cameron to try to find out why the family were stopped."
"A Downing Street spokeswoman said Cameron would consider the issues raised in Creasy’s letter and respond in due course. The prime minister has described Trump’s remarks as “stupid, divisive and wrong”.
"The US embassy in London did not immediately respond to a request [by the Guardian] for comment."
More at Sky News
Also at the Guardian "Calls for Cameron to step in after US bans British Muslim family from Disneyland trip."