The centre is built on the model of Colnbrook IRC, close to Heathrow Airport, which is essentially along the lines of a category B prison. As such is considerably different to Tinsley, with much less freedom of movement.
The building is composed of four accommodation wings, with a central activities area, to which detainees have restricted access. The vast majority of detainees are held in two-man cells. There is also a small seclusion unit with a few single cells, for detainees who are removed from general association.
Detainees are locked into their cells all night, and locked onto their wings for most of the day. Meals are served on the wings, and there are a few facilities such as pool tables and computer games on each wing also. The central activities unit contains a library, computer rooms, gym, religious prayer rooms and classrooms. There is also a visits room there, where social visitors, including GDWG volunteers, can meet up with detainees.
Visitors to Brook House must book a visit at least 24 hours in advance, by calling 01293 566500. All visitors must take along photographic ID, and be prepared to be searched on entry. Property can be dropped off, as long as it does not exceed the total weight limits allowed for each detainee.

"Your relentless effort in making sure I am in the good state of mind is very comforting. Your concerns is very assuring. I will always remember you in my prayers."
Former detainee