Ranald Crook, 76, was unable to fly home from Qatar because of a series of travel bans imposed on him at the request of former business associates, which left him tangled in legal actions in which every victory of his resulted in the initiating of a new case against him.

Crook spoke to The Times after reading on Thursday about a former senior vice president of Qatar Airways who was found dead in a Doha hotel room on Christmas Day in 2019 following his arrest and alleged torture by secret police.

Marc Bennett was accused of keeping confidential information belonging to the airline after his resignation in October that year, and was held for three weeks in a state security detention center before being released without charge but banned from leaving the country.

Qatari authorities claimed his death was suicide, but a British coroner found “no evidence of suicidal intent.” The UK Foreign Office urged Qatar on Wednesday to look into the allegations thoroughly.

Not only did Bennett not leave a suicide note or email or text his family and wide circle of friends, but the night before his death he had a video call with his wife and children during which, The Times reported, he was “laughing and joking.”

Bennett’s widow Nancy said: “There are so many questions. He left here with the whole world ahead of him.”

Crook, who finally returned to the UK at the end of 2021, said he was drained by his ordeal. He warned Britons to think hard before accepting large salaries to work in Qatar, noting that while still in the country, his wife would wake because he had been crying in his sleep.

He added: “If you go to work there, be very careful. Look very carefully at those you’ll be working with and their reputations.

“The accusations are made in five minutes, but it takes years to clear your name. I thought I had been cleared in November 2016, but another case began and another travel ban was slapped on.

“I wasn’t served with any court papers, I found out about the second action by chance in April 2017. There shouldn’t even have been a travel ban but this was Qatar, and these things happen.”

Both the detention of Crook and the circumstances surrounding Bennett’s death have raised further concerns in the build-up to the World Cup in November, and the decision to allow Qatar to host it.