Competition seeks the UK's 10 best inventions

Ben Ryan's son lost his arm when he was just 10 days old, and the prosthetic developed by his father has been shortlisted for the National Inventor Prize.The hydraulically-operated prosthetic arm is one of ten inventions which have been announced as finalists in a competition held by innovation foundation Nesta, with support from the Department for Business, Energy and Industrial Strategy (BEIS).A nationwide search to find the UK's best new inventor has turned up 10 top ideas which could eventua