Freeview viewers in the Scottish Borders will need to retune their TV equipment on March 1, to continue watching BBC channels.
A number of Freeview channels are moving to new airwaves to allow for the future development of new mobile broadband services, part of a major engineering programme being carried out between now and 2020.
Changes at the Selkirk transmitter will take place in the morning of Wednesday, March 1, and are expected to be completed by 9.30am.
After this, viewers in any of the 18,000 homes receiving their TV signal from Selkirk who find they are missing BBC channels should retune to get them back. High-definition (HD) BBC channels will not be affected.
Freeview will be running an information campaign to prepare people for the change, including advertising and on-screen messages.
Retuning should be straightforward and some TV equipment will retune automatically.
Anyone who needs advice, or who finds they are still missing BBC services after retuning, can visit the Freeview website at www.freeview.co.uk/borders or contact the Freeview Advice Line for free on 0808 100 0288.
Some older aerials may need to be replaced to continue receiving these channels and if this is the case help will be available. Further information is available online at www.freeview.co.uk/borders