Clansman is the name of a combat net radio system (CNR) used by the British Army from 1976 to 2010. Clansman was developed by the Signals Research and Development Establishment (SRDE) in the 1960s, to satisfy a General Staff Requirement (GSR) laid down in 1965. Most Clansman radio equipment was built by Racal, Mullard Equipment Ltd (MEL) and Plessey, although headsets and ancillaries were also produced by Amplivox, Marconi and others. Clansman represented a considerable advance over existing radios being offered to the Armed Forces at the time. It replaced the aging Larkspur radio system, and proved to be more flexible, reliable and far lighter. The technological advances achieved in the design of Clansman allowed the introduction of Single SideBand (SSB) operation and NarrowBand Frequency