Some eight local authorities in the UK are currently recording a weekly rate of new Covid cases higher than 750 infections per 100,000 people.
It comes as the UK battles to keep the Omicron variant under control, with the government announcing on Monday that all people aged 18 and over will be offered a Covid-19 booster vaccine.
Across the UK as a whole, a further 42,583 cases of coronavirus were reported in the most recent 24 hours.
Another 35 people were confirmed to have died, which now puts the official Covid death toll at 144,810.
Many of the worst-hit areas for infections are in the South West, with the highest current rate in Torridge, Devon, with a seven-day rolling case rate of 1,081.2 new cases per 100,000 people.
The UK’s seven-day rolling rate of infections is up 3.7% compared to this time last week.
These are the UK's eight Covid hotspots, and their weekly Covid case rates
Torridge: 1,081.2 cases per 100,000 people
North Devon: 895.4 cases per 100,000 people
Mid Sussex: 889.3 cases per 100,000 people
Gwynedd: 858 cases per 100,000 people
Elmbridge: 848.3 cases per 100,000 people
Guildford: 820.1 cases per 100,000 people
Wycombe: 782.1 cases per 100,000 people
Tandridge: 762.4 cases per 100,000 people
The map below show's the UK's rate of new Covid cases by local authority area. The higher the case rate, the darker the colour.
Speaking in parliament on Monday, health secretary Sajid Javid failed to rule out any future lockdown when urged to do so by Tory MP Richard Drax.
Instead he insisted that "putting the booster programme on steroids” is the country's main form of defence.
Deputy chief medical officer Professor Jonathan Van-Tam said the booster campaign was “as urgent as it could possibly be” – but added people should not panic over the new variant.
He told a Downing Street press conference: “I want to be clear this is not all doom and gloom at this stage and I do not want people to panic at this stage.
“If vaccine effectiveness is reduced, as seems pretty likely to some extent.
“The biggest effects are likely to be in preventing infections and hopefully there will be smaller effects on preventing severe disease."
However, it could be three more weeks before further details emerge from scientists on how transmissible the variant is, whether it evades vaccine protection, and whether it causes more severe disease.
The UK Health Security Agency (UKHSA) identified two further cases of the Omicron variant in England on Monday, bringing the total to five.
The individuals who tested positive are not connected and are not linked to the previously confirmed cases.
One case is located in Camden, London, and the other case is located in Wandsworth, London. Both have travel links to southern Africa.
The Joint Committee on Vaccination and Immunisation (JCVI) also advised that young people aged 12 to 15 should be offered a second dose of the Pfizer/BioNTech Covid-19 vaccine, no sooner than 12 weeks after their first dose.
Further advice said that severely immunosuppressed people should be offered a booster dose no sooner than three months after completing their primary course of three doses.
The JCVI said that both the Moderna and Pfizer/BioNTech vaccines can be given as a booster for adults – with equal preference given to both.