London is at R=0.4. The North East is at R=0.8. Why is the average person in the North East infecting more people than is the average person in London, given that lockdown is no less stringent in the North East? All I can think of is that consequent upon the recent large number of deaths and infections in London, there are now fewer potential victims, due to the greater percentage of those with virus resistance within its population. Herd immunity is the inevitable outcome, whatever we do..