BBC 100 Years Tech Special

Click celebrates the 100 years anniversary of the BBC by looking at some of the technology pioneered by the BBC, which has transformed the world of broadcast. The team return to the birthplace of the BBC - Alexandra Palace in London, and look at the stories behind this innovation - from the BBC microphone to the famous "pips" - and look forward to some of the latest technology being developed which could shape the next 100 years.