Lovely picture! We saw a similar nest of sleeping red squirrels perched on a small barred windowsill at a rural holiday house in France ( the property had been empty before we arrived). So cute- but I did not grab a camera! Needless to say this was long before Covid! Nice to be reminded of us all creeping around to avoid waking them!
Haven’t checked dr google but think Scotland is the only place in the UK with red squirrels. We saw some in Switzerland years ago, apart from that it’s grey all the way. What a sweet photo.