Guantanamo

The British government is seeking the release of five detainees from the American detention facility at Guantanamo Bay in Cuba.  These men are not British citizens, although they had been granted leave to remain in the UK.  There is good reason to suppose that they may be very dangerous terrorists.  It is not clear that we have the right laws to detain them in the UK, nor is it clear that we would ever be able to expatriate them.   If we do have to detain them in the UK, the costs of doing so are likely to run into many millions of pounds.  So why do we want them back?