The Home Office are reported on the BBC news site as saying that Menezes'
visa had expired. 'A passport stamp apparently giving him indefinite leave
to remain "was not in use" on that date, added officials.':
http://news.bbc.co.uk/1/hi/uk/4725659.stm.

What on earth does 'a passport stamp ... "was not in use" on that date'
mean? What's this a euphemism for? Had it been granted but later revoked?
Does it mean that there was an issue date on the stamp and that this type of
stamp wasn't being issued on that date (ie that the stamp is a forgery)?

The phrase "not in use" sounds as if it deserves a "Clear as Mud" award for
its inability to say exactly what it means!