This is the lowest figure for a Sunday, after eight deaths were also confirmed last week.
But at the same time, more than 1,000 new positive cases of Covid-19 have also been confirmed in the past 24 hours – this is the first time since June 25 that daily new cases have exceeded 1,000.
The figures show an additional 1,062 positive tests, bringing the total number of infections in the UK to 310,825.
Yesterday, 758 new cases were confirmed.
18,249,668 tests have been carried out in the UK since the start of the pandemic.
Previously, ten other Covid-19-related deaths had been reported in UK hospitals in the past 24 hours.
No new deaths have been reported in Scotland or Wales.
Northern Ireland has yet to release its figures today.
In recent Sundays, the death toll increased by 8 on August 2, 10 on July 26, 9 on July 19, 15 on July 12 and 19 on July 5. The biggest increase on a Sunday was 710 on April 12, with the UK at the height of the pandemic.
The number of coronavirus deaths in English hospitals rose by ten on Sunday, bringing the total to 29,411, NHS England said.
The patients were between 45 and 89 years old and all had known underlying health problems.
Two deaths have been reported without a positive Covid-19 test result.
The region with the highest number of fatalities was the Midlands with four.
There have been three deaths in the North East and Yorkshire, two in the East of England and one in London.
No deaths have been reported in the North West, where local lockdowns in place in Greater Manchester and parts of eastern Lancashire were extended on Friday to include Preston.
Public Health Wales said no further deaths have been recorded among people who have died after testing positive for Covid-19, so the total number of deaths in the country remains at 1,579.
The number of cases in Wales has increased by 26, bringing the confirmed total to 17,451.
Scotland has recorded 48 new cases of the coronavirus in the past 24 hours, as the number of positive tests approaches 19,000.
A total of 394,455 people in Scotland have tested with 18,998 positives, of which 2,491 have died.
The latest figures come as a former government chief science adviser warns the UK could be back under lock and key next month.
Sir David King said: “We need an appropriate test and traceability system by September. Otherwise, the full opening of the school will bring us back right away.
Sir David says we are “a long way” from the safe reopening of schools.
He urges Boris Johnson to ‘get it right’ in August – or to deal with a second wave of coronavirus infections.
And he called the government’s tracking and traceability policy “disastrous”.
Sir David, 80, heads the Independent Scientific Advisory Group for Emergencies, which supports the Prime Minister’s science team.
He said: “The government has one month to deal with the level of infectiousness as it currently stands. Reopening schools should be a priority, but we believe we are far from the point where it can be done safely. ”
He said the R infection rate is expected to increase by about 0.5 with all schools open.