Posted by HowardDavies on
URL: https://www.shado-forum.com/Century-21-Sound-Effects-tp1509026p1509051.html

With reference to sound effects....the following is from the authorised
biography of Gerry Anderson..."John and Jean Peverill created over 500
sound effects from Supercar to Thunderbirds, this was sold as a
seperate business to Ralph Rogers for £10,000".
I suspect that post Thunderbirds series would have had access to this
sound effects library and would account for some of these effects
cropping up in other feature films.

Howard Davies.