A prisoner is entitled to a room four times the size that the DWP maintains is a bedroom for a social tenant.
I was alerted to a Ministry of Justice document called Certified Prisoner Accommodation which sets out the minimum sizes for prisoners and the relevant size issue is detailed below and is from ppage 45 of the MoJ document
Note it says minimum size for a single cell is 6.8msq or 73.31 square feet of floor space
Now skip to the DWP guidance issued in HB circular U6 of 2103 (Yes that’s the one they rushed out after the Fife room size bedroom tax wins aka the Capt Mainwaring guidance!)
Paragraph 5 of this says: –
In determining whether or not a room is a bedroom the landlord may consider a number of factors, but one of these must be whether or not a room is large enough to accommodate at least a single bed
To read that literally it says if a room can fit in a single bed (and nothing else) then its a bedroom. That is the view of the DWP. You could have no space at top, bottom or any side of the single bed in such a room according to DWP ‘guidance.’ It could also mean literally a room is a bedroom if it can fit a single bed in it standing on its end about 3ft x 2ft or 6 square feet! Yet a single bed is typically 6 feet 6 inches in length and about 2ft 9 inches at the narrowest making 17.88 square feet which the DWP by definition say is big enough for a bedroom.
Hence a prisoner is entitled to 73.31 square feet or more than 4 times the floor space of the 17.88 square feet the DWP deem is big enough for a social tenant!