Figures show that prison cases within England and wales are on the up.
Still less than 60 though it's doubled since last update a week ago.
The figure of a 1000 in isolation highly suggests that ever prison within the estate is affected.

18 prison staff and four prison escort staff also have tested positive.
The biggest issue is the 3,500 employees around a tenth of the workforce are currently in self-isolation
It's going to be an uphill task to stop the numbers running away from staff.
Easy release will need to happen at some point and around 50 pregnant prisoners will have to dealt with quickly if they can be safely released.