Mystery was surrounding Covid-19 testing in London as figures showed a sharp drop in confirmed cases in the capital despite the belief the virus is spreading.
The number of cases fell from 2,335 in the seven days from September 4 to 10, to 1,699 in the period from September 11 to 17.
With medical and scientific chiefs warning that the virus is spreading fast, the number of positive cases would be expected to rise.
