Terror alert after traveller flies to Pakistan on sister's passport

 for Pakistan International Airlines at Birmingham, said: “We will be investigating this matter. Obviously it is being taken very seriously and we will look into it.”

Mr Raja, who flies to Pakistan twice a year, said the error was unforgiveable, and could have led to a major security breach.

“There’s a lot of difference in the pictures,” he said. “I don’t look anything like my sister. I could have been a fugitive but they put me on a plane at Birmingham.

“As soon as I got to Islamabad the Pakistani officials took one look at my passport