Residents in Newbury who attended the Showground testing centre are being asked to 'test again', after concerns were raised about the accuracy of tests at the site.
An estimated 43,000 people may have been given incorrect negative PCR test results between 8 September and 12 October, mostly in the South West of England but also including the Newbury Showground test site.
Health Officials are now urging people to get tested if they had a negative PCR result before the 13th of October.
West Berkshire Council has opened a mobile testing centre at the Rugby club today, which is available for pre booked appointments.
Watch: A mobile testing centre opens at Newbury Rugby Club.
Dr Will Welfare, Public Health Incident Director, UK Health Security Agency (UKHSA), said:
"We have recently seen a rising number of positive LFD results subsequently testing negative on PCR. As a result of our investigation, we are working with NHS Test and Trace and the company to determine the laboratory technical issues which have led to inaccurate PCR results being issued to people. We have immediately suspended testing at this laboratory while we continue the investigation."