What is the difference between analogue and digital? The main difference is the way the TV aerial. Analogue transmits the signal very similar to how radio does. Digital is the transmission of the waves as bits of computer data. Why was there are a digital switchover? Though the US and other countries had switched over to digital since 2009, it was not until October 24th 2012 that the UK joined them. This meant we could receive the signals faster and have a clear picture quality plus we now have more channels. A huge campaign was launched several months before, including posters and leaflets, in order to let as many people as possible about this. What happens to the old analogue TV sets? Sadly the analogue signals are no longer being broadcast, so those people who haven't switched over will not get television if they do not retune.