BBC Homepage Skip to content Accessibility Help Your account Home News Sport Reel Worklife Travel Future More menu More menu Search BBC Home News Sport Reel Worklife Travel Future Culture Music TV Weather Sounds Close menu BBC News Menu Home War in Ukraine Climate Video World US & Canada UK Business Tech Science More Entertainment & Arts Health In Pictures BBC Verify World News TV Newsbeat UK England N. Ireland Scotland Wales Isle of Man Guernsey Jersey Local News Published 7 hours ago Share close panel Share page Copy link About sharing By Gordon Corera Security correspondent, BBC News More than 20,000 people in the UK have now been approached covertly online by Chinese spies, the head of MI5 said. It comes amid a new warning to tens of thousands of British businesses of the risk of having their innovation stolen. Ken McCallum was speaking to the BBC at an unprecedented public appearan...