Operation Postmaster was a British special operation conducted on the Spanish colony of Fernando Po, now known as Bioko, off West Africa in the Gulf of Guinea, during the Second World War. The mission was carried out by the Small Scale Raiding Force (SSRF) and the Special Operations Executive (SOE) in January 1942. Their objective was to board the Italian and German ships in the harbour and sail them to Lagos. The SSRF under the command of Major Gus March-Phillipps left Britain in August 1941 and sailed the Brixham trawler, Maid Honor, to the Spanish colony.