Alan Berry (born c. 1940s) was an uncredited special effects technician on Thunderbirds Are Go. He later worked on Captain Scarlet and the Mysterons, Joe 90, The Secret Service, and UFO. During the 1980s at least, Berry worked at Clearwater Films in Battersea.
At some point after Century 21 folded, he went on to own his own studio and lighting company, which he moved to Shepperton c. 2010. It is unknown whether Berry still owns this studio and lighting company to this present day, however.