A regional map for testing across England shows the towns and cities suffering high numbers of cases.
The data, collected by Public Health England, covers all mass testing in England, including that carried out in NHS and PHE labs - known as pillar one - plus all community testing, drive-throughs and tests sent to people's homes, known as pillar two.
The map shows that the worst affected regions (with at least 45 cases per 100,000 people in the week to June 21) are:
- Leicester - which went into further lockdown on Tuesday
- Barnsley
- Bradford
- Rochdale
There are six areas in the next worst affected category (30-44.9 cases per 100,000), which are:
- Bedford
- Blackburn with Darwen
- Tameside
- Oldham
- Kirklees
- Rotherham
Sky News say they were told by sources in PHE and the Department for Health they are "working collaboratively" and that more local lockdowns could be implemented in "just days".
Meanwhile, Boris Johnson was accused of being slow to respond to the coronavirus outbreak in Leicester, resulting in the city being forced into a local lockdown.
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Labour leader Sir Keir Starmer accused the Prime Minister of presiding over a "lost week" when action could have been taken in the first real test of Mr Johnson's "whack-a-mole" strategy for tackling coronavirus clusters.
The Prime Minister insisted that action had been taken swiftly and defended the sharing of testing figures with local leaders.
