From thebureauinvestigates.com: "The Home Secretary has stripped at least two additional individuals of their British citizenship in recent months, the Bureau has learned.The two new cases were revealed by a recent Freedom of Information request made by the Bureau. One deprivation notice was issued late last year, taking the total number who lost their UK nationality in 2012 to six. A further case took place between January 1 and mid-March, when the Freedom of Information request was submitted.
The Home Secretary cannot remove citizenship if it will make an individual stateless, so the orders can only be made against dual-nationality individuals.
...Deprivation of citizenship orders take effect immediately, often leaving individuals stranded abroad with no UK passport in a process likened to ‘medieval exile’ by leading human rights lawyer Gareth Peirce.