Did those 100 covid cases at Wilsthorpe School in Derbyshire catch it at school?
(In which case schools aren't "safe" are they? They're clearly not even "covid secure" are they?)
Or is there a hidden reservoir of presumably asymptomatic covid in that local area?
Or both?
Might there be hidden covid in other areas?
And does this have implications for the roadmap and the back to your workplace push?