I am unaware of any change of service other than due to weather conditions. BBC says:
High Pressure weather conditions affecting television and radio reception across the UK from 16th June 2025
Some viewers and listeners across parts of the UK might experience short term interference to television and radio services.
Or might you have switched it off accidentally?
How do I use the Red Button?
Simply press the red button on your remote control at any time. Sometimes you will be prompted to press the red button by an announcement in a programme or a red button logo appearing in the top right-hand corner of your TV screen.
The BBC's Red Button service allows you toaccess additional television programming,live coverage from major sporting and cultural events, sports scores, lottery and weather information as well as the latest breaking national and global news stories.
It'savailable with any digital service, though the type and number of features vary according to whether you have digital terrestrial, satellite, cable or broadband. Most of the interactive features currently available are provided by the BBC, Sky and the cable companies. A few other broadcasters, including ITV, offer a limited range.
TheRedButton graphic can be removed from your screen by one simple action, dependent on the platform you are watching on:
Sky - Press the BACK UP button
Virgin Media - Press the BLUE button
Freeview - Press the BACK or GREEN buttons
Freesat - Press the BACK or GREEN buttons
Otherwise, you might need to retune your set. See:
www.bbc.co.uk/reception/red-button