Were Is Slade Prison?

Currently the most-repeated show on terrestrial TV, Porridge was set in HMP Slade, a fictional prison in Cumbria.

Is there a real Slade Prison?

The frontage of the former St Albans Prison was used as the fictitious H.M. Prison Slade in Cumberland.

Which prison is Porridge filmed?

It was shot mainly on location at Chelmsford Prison, Essex, which was unoccupied at the time because it was being refurbished after a fire in one of the wings. The escape sequence was filmed in Buckinghamshire and Boxley, Kent. There is also a brief shot of the gates of Maidstone Prison.