It could be essential maintenance taking place which is usually carried out overnight to minimise disruption. Otherwise check to see if there are any outages nearby via this link https://www.sky.com/servicechecker
(This should determine if there's an identified fault affecting multiple households)
If there aren't any then try running the line test here https://www.sky.com/help/articles/broadband-diagnostic-start
You can also run the test via the MySky app on a mobile data connection.
Once completed, if it reports back that all is good click on 'broadband' to run an updated test. If you get amber or red you need to follow the on-screen instructions.
▪️I AM NOT A SKY EMPLOYEE (undercover or otherwise) ▪️
Sky customer since 2001
with: Sky Q | Sky Superfast Broadband | Sky Talk | Sky Mobile
NOTE: I only provide help on the forums and NOT via PM
