Harry Williamson (born 12 May 1950) is a British musician, producer and inventor.
Williamson was born in Ilfracombe, North Devon, the son of noted author Henry Williamson and his second wife Christine Duffield. He is divorced, with one daughter, Bee Williamson. He was educated at Exeter Cathedral School under Lionel Frederick Dakers (later head of RSCM), and at Millfield School, Street, Somerset.
He started a Physics degree at Imperial College, University of London, but abandoned Physics for rock theatre, working at Glastonbury Festival and the Rainbow Theatre and crewing for The Rolling Stones in the 1970s. He helped establish the Green Party of England and Wales and is still actively involved in designing innovative energy efficient systems.
In 1970 he met Anthony Phillips of Genesis with whom he composed music for the film of his father's bestseller Tarka the Otter. The music, recorded by the National Philharmonic Orchestra was not used in the film due to budgetary considerations but some years later was finished with funds from Amy International and released by PRT, where it became #1 in the New Music Charts for three months. It is still regarded as a classic by Genesis fans and excerpts are used for documentaries and other nature oriented films worldwide. Another series of recordings with Anthony, started in 1976, became Gypsy Suite, released 1998.
In 1977 Williamson was playing with Nik Turner of Hawkwind and he wrote "Nuclear Waste" which was recorded by The Radio Actors, with Sting on vocals, Mike Howlett on Bass and Steve Hillage on lead guitar. It was released by Virgin Records and later by Charly and is still considered an anti-nuclear anthem in Eastern Europe.