Terrorist Works on the Underground

The Sun is reporting that Abu Hamza's son was allowed to work on sensitive parts of London Underground. This man has been in prison in Yemen for plotting to bomb British and American targets there. Nevertheless, he passed security checks and was allowed to work on parts of the Underground Network deemed the most likely to be attacked by terrorists.

He was only stopped when other workers recognised his picture in the newspaper and reported him to managers who promptly sacked him. This indicates that the public take this sort of thing seriously. Why then has the Home Office not published pictures of the escaped terror suspects?