Yo, Oldbritfag here. I live on the East Coast of the UK, where our fighter jets are stationed. We send Eurofighters to intercept the Russians all the time.
Aircraft activity was high in all NATO countries from 8am, noticeably within Belgium. News of the interception started to come in at 9am within MSM.
Luftwaffe 14+0E or whatever it's call sign, (I noticed people interested in it for a few bakes) took off around 8am also.