This growing pressure on space causes each successive government to promise "stern action" against overstayers.

CNN: ONE OF THE PERKS OF THE JOB

Successive government ministers have rejected his applications for early release, leading to a series of legal battles.

BBC: Undated file photo of Jordanian Nezar Hindawi

Successive government and independent studies have established that such an attack would disrupt for a protracted time, and possibly destroy, our electrical grid and all the infrastructures that rely upon it.

CENTERFORSECURITYPOLICY: On Obama's watch