People in Clydebank are being warned that they may experience interference to their TV services as work begins to improve mobile networks in the area.
There is a small chance these upgrades may cause interference to TV received through an aerial such as Freeview, BT, TalkTalk and YouView.
Symptoms could include intermittent sound, blocky images (pixelation) or loss of TV signal.
Anyone who does experience interference can get help by contacting Restore TV, which helps people who are 75 or older, blind or partially sighted, or are in receipt of certain benefits.
Cable and satellite TV, such as Sky or Virgin, are not affected. However, viewers with these services who also watch free to view TV through an aerial, can receive a free Restore TV filter.
Restore TV is an independent initiative run by Digital Mobile Spectrum Limited (DMSL), which in turn is owned by the UK's four mobile operators – EE, O2, Three and Vodafone.
Any viewers who experience new interference to free-to-view TV should contact Restore TV on 0808 13 13 800 (free from landlines and mobiles), or visit www.restoretv.uk
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