4G/LTE TV interference
Call it what you will; 4G or LTE (long term evolution), the latest mobile phone technology which will shortly be rolled out across the UK has the capacity to interfere with TV signals.
Around 20 million households are thought to receive their TV signals via Freeview and depending where you live interference can be a problem. TV signals are broadcast on different frequencies in different areas and channels 59 & 60, those closest to the 800 MHz 4G base station operating frequencies are most likely to suffer from interference. More information on the subject can be found at https://at800.tv/