"When I see the pictures I do get anxious," said Griffiths.

"If we're not in a household bubble we need to be two meters apart and I don't think those pictures look like that's happening."

British Health Secretary Matt Hancock also issued a warning Tuesday night. "Let's enjoy the sun but let's do it safely. We have come so far, don't blow it now," he said on Twitter.

Another 4,040 people in Britain have tested positive for COVID-19, bringing the total number of coronavirus cases in the country to 4,341,736, according to official figures released Tuesday.

The country also reported another 56 coronavirus-related deaths. The total number of coronavirus-related deaths in Britain stood at 126,670. These figures only include the deaths of people who died within 28 days of their first positive test.

From Monday, two households or groups of up to six were allowed to meet outside, including in private gardens, and outdoor team sports are reopening.

From April 12, non-essential retail, as well as restaurants and pubs, if serving people outdoors, will be allowed to reopen in England.

On Feb. 22, British Prime Minister Boris Johnson announced his roadmap exiting the lockdown, the third of its kind since the start of the pandemic in the country. The four-step plan is expected to see all legal restrictions in England being removed by mid-June.

Experts have warned that Britain is "still not out of the woods" amid concerns over new variants and the third wave of the pandemic in the European continent.

To bring life back to normal, countries such as Britain, China, Russia, the United States as well as the European Union have been racing against time to roll out coronavirus vaccines.