13:30

The Welsh first minister, Mark Drakeford, has raised concern over some construction sites remaining open.

He said work was being done to establish which sites had to be kept going, such as building work on hospitals and on properties damaged by this year’s floods.

But Drakeford said: “I believe there is a strong case for closing some construction sites. There are sites open today that do not need to be open and will not be open before many days are over.”

At a press conference in Cardiff, he said it was “not acceptable” that self-employed people were not currently being treated the same way as employees.

Calling for the UK government to do more, he said: “It is not acceptable that people should have different forms of help dependent on their employment status.”

Drakeford said letters were about to go out to 100,000 of the most vulnerable people in Wales asking them to stay at home – not going out at all – for 12-16 weeks.

He said there seemed to be no reason why there has been a cluster of cases in the area covered by the Aneurin Bevan University Health Board, which includes parts of south-east Wales. “It’s one of those random things,” he said.

Drakeford said there had been an “astonishing groundswell” of volunteers keen to help in the response to the virus from hoteliers to council staff. He also suggested a leisure centre could be turned into a makeshift hospital.

The first minister said 800 people a day in Wales were being tested for the virus – but within a week or so this would increase tenfold to 8,000 a day. Key workers in the health sector would be tested first, then people in social care and after that it could be rolled out to others.