Such rooms were almost always built into one of the wings of a prison; following the recommendation of prison governors during the 1948 Royal Commission on capital punishment, further execution chambers were housed in purpose-built blocks, separate from the main prison. The last gallows to be constructed and used in Britain, at HMP Aberdeen, was built in 1962, and was used one year later for the hanging of Henry John Burnett, the last person to be executed in Scotland. A freestanding execution block was built at HMP Perth in 1965, but was never used. This was the last gallows to be constructed in the United Kingdom.