Base station not showing GSM signal

Hello,Today I unplugged my base station for an hour as I needed the plug for something else. I noticed I got a notification saying base station on back up normally I also get a message via the app that is working on GSM back up. This did not happen today.When I checked on the app under devices the base station is not showing anything for GSM (It used to show GSM signal). Is there a problem with the service today? I do pay for the motoring plus service. Photo attached.Any advice greatfully received. I should mention I am based in the UK.Thanks JamesPhotos attached.