Video content Video caption: Coronavirus: Tests to be rolled out to care home staff and residents and over-65s Coronavirus: Tests to be rolled out to care home staff and residents and over-65s

The testing changes announced by Matt Hancock earlier this evening represent a massive expansion of who is eligible for testing in the UK - and means we are now one step away from allowing everyone to access a test if they have symptoms.

That will be crucial when lockdown restrictions are eased as part of the "test, track and trace" strategy to keep coronavirus at bay.

It is being made possible by the roll-out of home-testing kits and mobile units staffed by the Army.

The problems experienced getting more people tested have - to some extent - been because the network of drive-thru testing centres have not always been in convenient locations.

There is plenty of lab capacity to process the tests now the three mega labs are up-and-running in Milton Keynes, Glasgow and Cheshire.

The expansion has also allowed the government to do something that could prove crucial in tackling the epidemic in care homes - the testing of residents and staff without symptoms.

A big concern is that the virus has been able to get a foothold in care homes via people transmitting it before they develop symptoms or if they are asymptomatic.

But promising something is one thing - delivering it is another.

While the capacity looks like it will be there to test 100,000 a day by the end of the month as promised, the numbers actually getting tested are currently less than half that.