Digital TV platform Freeview says that people around the UK are experiencing reception problems because of high-pressure weather conditions.
Freeview’s free-to-air channels include those from the BBC, Channel 4, Channel 5 and ITV.
The website Downdetector has nearly 5,000 comments from viewers reporting that they can’t access channels at all, or that the picture is distorting.
Freeview says those affected should not re-tune their TV sets or boxes.
“At the moment, it looks as though these conditions may continue throughout the week,” Freeview said in a statement.