Freeview interference from 800Mhz 4G 2013-

The areas shown in are the potential locations for 4G-at-800MHz services that may interfere with Freeview reception at some point from 2013 to 2017 when the 4G 800MHz services start. The map below shows all the UK digital TV transmitters that will need to retune to clear C61 and C52. For full explanation, see How do I know if the 4G broadband will overload my Freeview?.

What do the map symbols mean?

 4G-800 1 multiplex,  4G-800 2 multiplexes,  4G-800 3 multiplexes,  Freeview retune required.