Raspberry Pi - a globally successful British tech invention - today marks ten million sales.

The ground-breaking credit card sized computer, devised by a cutting edge tech start-up in Cambridge and built by highly skilled British workers in a factory in South Wales, is used in tens of thousands of schools across the world to teach coding - including Britain, India, Singapore and North and South America.

Digital novices can also plug the low-cost device into their TV or any other display with a standard keyboard and mouse and learn how to program - helping to break down socio-economic barriers and open up the digital world.

Raspberry Pi is more than a teaching aid, though. It has been used by scientists to help purify the water supply in Africa and on the International Space Station by astronaut Tim Peake, who has been running British schoolchildren’s scientific experiments via the Astro Pi project. It is a stellar example of British ingenuity combined with natural business sense.