The first stage of digital switchover in Lewis, Wester Ross, north west Sutherland and parts of Harris and Skye has now been completed, according to Digital UK.
All Freeview viewers in these regions covered by the Eitshal transmitter groups will now need to retune their TVs and boxes.
Analogue BBC Two has been turned off permanently at the Eitshal transmitter and digital signals have been switched on at eight relay transmitters serving thousands of homes.
These households will be able to receive Freeview for the first time but the changes also affect existing Freeview viewers who may find their BBC TV channels are missing. These services have moved to new frequencies and can be restored by retuning Freeview TVs and boxes.
The final stage of the Eitshal switchover takes place on 21 July when the remaining analogue channels will be switched off permanently. On this date, further Freeview channels from STV, ITV, Channel 4 and Five will also become available from relay transmitters for the first time.
DTG Staff | 07.07.2010