Professor John Tulloch, 70, was sitting opposite a suicide bomber on a Circle line train and only avoided death because of his luggage. He was visited in hospital by the Prince of Wales after the attacks and a picture of his bloodied face was published on the front page of a national newspaper.
Professor Tulloch - who suffers from post-traumatic stress disorder - has now had his British passport confiscated despite being born in pre-independence India and having a British wife and children.
A UK Border Authority spokesman said: “It is the responsibility of an individual to check that they will not lose a previously acquired nationality or citizenship on acquiring an additional one.”
David Wood has this report.