Hidden away in some dusty corner in government vaults in London there must be a well-thumbed dossier containing secret evidence which kept a Palestinian caged in Britain without charge or trial for more than a decade. Described by successive home secretaries as the most dangerous man in Britain, it may seem surprising to many that he was never charged in the UK with a single criminal offence. Perhaps it is even more surprising that when justice was finally delivered to Abu Qatada it was done so in the very country from which he'd fled because of its atrocious human…