HC Deb 13 May 1980 vol 984 c422W
Mr. Dubs

asked the Secretary of State for the Home Department how many prisons in England and Wales have a cell within a cell sometimes known as a strong box; if he is satisfied that such facilities are necessary; and how many prisoners were kept in such strong boxes in 1979.

Mr. Brittan

One or more special cells for the temporary confinement under rule 45 of the prison rules 1964 of refractory or violent prisoners are provided at 46 prisons. We are satisfied that they are necessary. During 1979, use was made of them on 456 occasions: information about the number of prisoners so confined is not readily available.