Simon Posford (born 28 October 1971), better known by his stage name Hallucinogen, is an English electronic musician, specializing in psychedelic trance music.

[2] A third album consisting of Hallucinogen tracks remixed by the artist Ott, In Dub, was released in 2002.

He is also the founder of the label Twisted Records[3] and works in the electronic groups Younger Brother and Shpongle.

[4] Younger Brother initially began as a side project of Posford and Benji Vaughan and represented a transition away from previous projects which emphasized a more synthesized style.

[5] His grandfather, George Posford, was a composer and producer in the United Kingdom in the 1930s.