More local lockdowns are "just days away" after a list of 36 areas where coronavirus is spiking were revealed, it has been reported.
Leicester was placed into a local lockdown on Monday after its infection rate hit 135 per 100,000 people, a figure which Health Secretary Matt Hancock told MPs is three times higher than the next highest local area.
The lockdown means all non-essential shops were shut and schools closed to most pupils while anyone in the city with symptoms has been asked to come forward.
The government also says extra funding will be made available to increase testing.
On Tuesday a list of 36 cities and counties where the deadly coronavirus is experiencing local spikes was revealed, and it is said to indicate other areas of the country which could also be at risk of similar local lockdowns.
Now, sources in Public Health England and the Department for Health are said to have told Sky News they are "working collaboratively", focusing on those 36 areas.
Sky News reports that the City of Bradford and boroughs in London, including Brent and Harrow, could be the next to go into a local lockdown.
The news channel says there are concerns that local lockdowns may be brought on because of high numbers of Black Asian and Minority Ethnic (BAME) people in those communities, stating that BAME people have been disproportionately hit during the pandemic.
Some of the factors include multi-generational and overcrowded housing and the fact that many key workers are from the BAME community.
It is reported that Leicester, Brent and Harrow all have high numbers of overcrowded homes, which are said to be predominantly occupied by people from south Asian heritage.
The number of patients and staff testing as positive in hospitals and PHE labs, are known as Pillar 1 figures, and positive cases identified in testing centres, are known as Pillar 2.
A Public Health England spokesperson said: "PHE publishes daily cases of Covid-19 broken down by local authority which includes people tested as part of Pillar 1.
"This is used as one of a number of indicators to help us and partner organisations to identify trends in local areas and to take action accordingly.
"To use these data in isolation to predict which areas will see significant increases in cases is not appropriate as they do not provide a complete picture of what is happening locally."
But a number of local councils whose areas have been reported on the list of 36 areas where the virus is said to be spiking have moved to calm fears.
Wandsworth Council leader Ravi Govindia said: "These claims of a local surge and a lockdown are wholly inaccurate and people should not panic or feel unduly alarmed."
He added: "If a scenario develops where we need to take additional steps then people can be reassured that we are well placed to do so without delay - but that is not a scenario we are facing at the moment."
Mark Ansell, Havering Council's Director of Public Health said: "We are aware of reports that local areas including Havering may be facing a lockdown due to increased cases of Covid-19.
"The source we assume the Daily Express article is based on shows an increase from two to eight cases in Havering from one week to the next.
"It is an increase, but from a low base and is likely to reflect more testing and the outcomes of contact tracing rather than a sustained spike in cases.
"Public Health England London have reviewed cases in London and the overall trend remains downwards. We are nowhere near the levels where a lockdown would even be considered.
"Our outbreak plan is now in place and we are working closely with national partners on contact tracing and locally to make Havering Covid-secure.
"It is expected that cases will begin to rise as people begin to emerge from lockdown. This is why the NHS Test and Trace service is in place and testing is being expanded.
"There is no cause for alarm but we do need to stay alert – coronavirus has not gone away. We all need to continue with social distancing, and maintain effective respiratory and hand hygiene.
"Anyone with Covid-19 symptoms must self-isolate and request testing so that their close contacts can be traced before they unknowingly spread the infection further.
"Only by working together can we protect the vulnerable, the NHS and the economic and social life of the borough from the threat of Covid-19."
Kate Blackburn, Interim Director for Public Health at Wiltshire Council, said: " All the data suggests Wiltshire residents have been disciplined in following the guidance and social distancing measures, and there is currently no reason to believe that will change significantly any time soon.
"However, the Local Outbreak Management Plan will ensure Wiltshire Council and our partners can keep a close eye on any changes.
"We all need to work together to ensure this plan is as effective as it can be, should there be a local outbreak. Together with our partners, we have made sure there is a strong framework in place to support an effective outbreak response.
"However, we need communities up and down the county to play their role too and continue with their tremendous efforts so far to keep the infection at bay by following the guidelines closely."
Areas with cases on the rise include:
Barking and Dagenham
Hammersmith and Fulham
Isle of Wight
Kensington and Chelsea
Redcar and Cleveland
Richmond upon Thames
Windsor and Maidenhead