Question to the Department of Health and Social Care:

To ask the Secretary of State for Health and Social Care, what proportion of positive tests for covid-19 infection as recorded by (a) different health and social care organisations and (b) the Office for National Statistics are confirmed by subsequent positive tests before being reported as positive tests.

We do not publish the information requested. However, all organisations performing tests are aware that they should follow the industry best practice for pathology testing and ensure they meet all the legal and regulatory obligations required for testing for COVID-19.
Under the Health Protection (Notification) Regulations 2010, it is a legal requirement to report positive cases of COVID-19 to Public Health England.