Listeners who already have a digital radio may have to retune to receive the new local services.

BBC: Beds, Herts & Bucks

All Freeview, BT Vision and Top Up TV viewers will need to retune their equipment to regain missing channels.

BBC: Digital Switchover

Many viewers will have to retune digital TVs or set-top boxes as some channels have moved to new frequencies.

BBC: Dundee becomes Scotland's first 'digital city'

During a lull in "Das Rheingold, " he noted, he and his colleagues even leave the orchestra pit to retune before their next entrance.

WSJ: It Takes Brass to Play the Wagner Tuba | By Barbara Jepson | The Ring of the Nibelung

Last month Freeview homes in South Wales had to retune their TVs and boxes following technical changes to a transmitter in order to make way for 4G.

BBC: 4G to affect TV reception in two million homes

Existing digital television viewers will have to retune their sets.

BBC: England