Planned Music Limited was established in March 1959 by Associated Television Limited as the British franchise owner of the Muzak System. It would begin operating in September 1959 using a distribution licence issued by the General Post Office (GPO). Initially, this was only available in London but it was later expanded into the Midlands and North West. Despite the initial success it suffered from higher-than-anticipated expenditure and delays in receiving GPO approval. It would eventually enter liquidation in 1998 and was dissolved in June 2001.

The General Post Office was established in England in 1660 by Charles II. It grew to cover telecommunications as well as the postal system. The GPO was abolished in 1969 and the assets were transferred to The Post Office, changing it from a Department of State to a statutory corporation.