In November 2014 Ofcom announced its decision to reallocate some of the airwaves used by Freeview to mobile services. A similar process is being carried out across Europe, as spectrum is reassigned to meet a predicted increase in demand for mobile data. As a result, some Freeview channels will need to move to new frequencies. This process is known as 700MHz clearance.
As part of 700MHz clearance, Ofcom states that in the UK:
Q3 2018 18 July 2018 Local North Kent and Sussex Changes
Bluebell Hill – main station and some relay stations
Hastings – Hastings Old Town relay only
Heathfield – main station and some relay stations
Tunbridge Wells – main station and some relay stations
Whitehawk Hill – Patcham relay only