Covid-19 cases go unreported was branded “shambolic”. Blundering officials at Public Health England admitted it failed to count 15,841 positive cases between September 25 and October 2.Red-faced bosses said the outstanding cases were transferred to Test and Trace “immediately” after thousands of potentially infected Brits faced a delay in being told to isolate.All cases were based to tracers by 1am on Sunday - meaning delays of more than a week in contacting hoards of Brits who had potentially been exposed to the virus.The glitch was reportedly caused by data files reporting positive cases being too big - exceeding the maximum size for a file.