PCR test will not be needed after positive lateral flow result under new plans in Wales

Those who test positive for coronavirus on a lateral flow test without showing symptoms will no longer need a follow up PCR to confirm the result.

Wales, along with the other UK nations, announced the change to the current testing system today.

It comes as demand on the PCR testing system continues to come under strain due to the volume of people testing positive for coronavirus.

Since Christmas Day, daily bookings at tests sites across Wales have reached up to 28,000 – a record high.

In a bid to free up tests for those with symptoms and to help reduce pressure, Health Minister Eluned Morgan has confirmed that if a person showing no symptoms has a positive lateral flow test they will no longer be advised to have a follow-up PCR test to confirm the result.

This is unless they are in a clinically vulnerable group, which may need early access to treatment or have been advised to do so as part of a research or surveillance programme.

This change will come into effect from 6 January and we estimate it will reduce the demand for PCR tests by between five per cent and 15 per cent.

In a second change people who are un-vaccinated contacts of positive cases and are self-isolating for 10 days should now take a lateral flow test on day two and day eight instead of a PCR test. This will help to increase PCR testing capacity.

This change will come into effect immediately.

In a statement released this afternoon, Ms Morgan said: “Wales Covid-19 testing capacity has increased significantly in NHS Wales laboratories and as part of a UK testing programme which is the biggest in Europe with almost 400 million PCR tests carried out since the start of the pandemic.

“As the omicron wave sweeps across the country demand for PCR testing has reached unprecedented levels across the UK. This has resulted in the UK Health Security Agency (UKHSA) constraining bookings at times to avoid exceeding the UK programme laboratory capacity and compromising turnaround times for results.

“As the prevalence of coronavirus is above 1%, the risk of false positives from lateral flow devices decreases. This means there is less value in having a follow-up PCR test to confirm the result.

“At higher prevalence levels, data suggests that lateral flow tests and PCRs have a similar positive predictive value.

“Without a follow up PCR tests it is even more important for people to report the result of every lateral flow test they do and self-isolate as soon as they test positive. Without reporting, contact tracing will not be possible, nor will advice and support be provided by the system.

“We need everyone to continue to play their part in disrupting the transmission of Covid-19 by reporting their lateral flow test results on the gov.uk website or by calling 119.

“Positive results from lateral flow tests already flow into the Wales contact tracing system to speed up the contact and support required to help all those who need to self-isolate.

“NHS and social care staff access testing from our NHS Wales laboratories. We may need to introduce further changes to protect PCR tests for key workers through the UK testing programme if demand continues to grow in the coming days and weeks.”

Ms Morgan added: “We may also need to introduce other temporary emergency interventions for non-vulnerable symptomatic individuals to manage demand and safeguard capacity to find the cases most likely to result in harm.

“We recognise these changes will potentially increase demand for lateral flow tests. There are no current issues with supplies but we are aware of issues with distribution for people to access tests at some collection points including pharmacies.

“UKHSA manage the logistics and deliveries across the UK and we are working closely with them to improve the situation.

“More than 4 million tests were distributed to workplaces, people’s homes and collection points in Wales last week.”