The year is 2031, in the UK TV broadcasts are no longer a thing as it's all streaming now (https://www.ispreview.co.uk/index.php/2022/12/broadband-woes-as-bbc-plan-to-switch-off-terrestrial-uk-tv-by-2030.html ), all non-mobile telephony services are VOIP and then something happens to Telehouse North (one of the UK's main internet connection points).
The mobile networks are overwhelmed with everyone switching to using them for everything - and even then, they have problems with unavailable services, failing routing and multiple retries.
No news availability causes panic...