A computer screen with a video game on it.
Image caption,

The computer game Worms (pictured) was created by Andy Davidson

BySteve HarrisSouth of England

Andy Davidson was 22 when the game he programmed, partly in his last years at Bournemouth School, first hit the shelves.

Thirty-one years later, the various incarnations of Worms have sold enough copies that everyone in the UK could have one.

Davidson said: "Across all formats and all versions of the game it's up to 70 million now. I just can't get my head around it."