Note

There are ten detention centres in the United Kingdom, the majority are located in England, mainly on the outskirts of the capital. Since the law does not specify a maximum period for administrative detention, men and women can be held for several years on the basis of administrative reasons. There are also four administrative detention facilities in the United Kingdom, used for short periods. Between 2007 and 2011, five camps were closed and four were opened across the UK. However, the total detention capacity increased by more than 500 places, from 2,842 to 3,419. This development reflects a process of rationalising migrant detention with the construction of large sites managed by private companies.