The station's coverage area suffers from co-channel interference problems, particularly to the south, not only with Brighton (Whitehawk Hill) but with the continent as well.

This includes towns such as Hastings, Eastbourne, Bexhill, St Leonards-on-Sea, Heathfield, Lewes, Uckfield, Seaford, Newhaven, Peacehaven, Crowborough, Hailsham, Haywards Heath, Burgess Hill and East Grinstead.

Along with Bluebell Hill, Dover and Whitehawk Hill, Heathfield transmits regional television services from BBC One South East and ITV Meridian (east).

Heathfield has 13 local relays: Bexhill, Ham Street, Haywards Heath, Hollington Park, East Dean, Eastbourne, Eastbourne (Old Town), Lamberhurst, Lewes, Mountfield, Newhaven, Sedlescombe and Wye.

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