By virtue of holding these offices OPSI publishes, through HMSO, the London Gazette, Edinburgh Gazette, Belfast Gazette and all legislation in the United Kingdom, including Acts of Parliament, Acts of the Scottish Parliament and Statutory Instruments.
Dette medfører at OPSI, gennem HMSO, publicerer blandt andet London Gazette, Edinburgh Gazette, Belfast Gazette og al lovgivning fra Det britiske parlament, Det skotske parlament og andre lovgivende organer.