The effect of banning social ceremonies of more than six people has come into force in England after an increase in cases of coronovirus.
The “rule of six”, which applies both indoors and outdoors, does not exempt children under 12 in England.
Similar restrictions in Wales and Scotland do not include children under the age of 11 and 12 respectively.
The government said that people are easy to understand.
But some conservative MPs pressured the government to follow Wales and Scotland to exempt young children.
Former minister Steve Baker said the latest government action amounted to “arbitrary powers without scrutiny” and MP Desmond Sven said it was “outrageous” not to have a parliamentary debate.
Cabinet Office minister Michael Gov described the new measures in England as “absolutely right”, saying some had “inadvertently” contributed to the spread of the virus as they negotiated.
“Therefore, a clear message – as simple as possible – makes it easier for all of us to do what is useful to others,” Mr Gov said.
Home Secretary Preeti Patel appealed to the public not to break the rules.
Ms Patel said: “Across the country, all of us have made a huge sacrifice in the fight against coronoviruses. However, the increase in recent cases makes it clear that more needs to be done to prevent the spread of the disease. the wanted.”
Under the new rules, large ceremonies are allowed in gyms, schools, places of worship, weddings and funerals. Education and work settings are not affected.
The “Rule of Six” in England replaces the current ban on the gathering of more than 30 people and the current guidance on allowing two families to live indoors.
England, Scotland and Wales each have new restrictions. Northern Ireland has not announced any changes.
Groups larger than six can be broken into by the police, with group members facing fines of £ 100 for the first offense, raising each offense to £ 3,200.
The Metropolitan Police said it would deploy resources across the capital to enforce strict restrictions on social ceremonies.
But the West Yorkshire Police Federation, which represents rank-and-file officers, warned that staff is already so dispersed that it is unrealistic to rely solely on police to enforce the new law.
Martin Hewitt, chairman of the National Police Chiefs’ Council, said that stopping the spread of coronaviruses is “a shared effort”.
He said: “The demand for the police service is now at the same levels as before the epidemic, which is critically important that we all take personal responsibility, stick to boundaries and stop the spread of this deadly virus.”
The government said that Kovid-safe marshals would be started in the city and city centers to help follow the rules.
But local councils – who would be expected to provide staff – say they would need to be fully funded.
The new rules come as the UK’s R numbers are rising, rising between 1 and 1.2 for the first time since March.
Any number above indicates that the number of infections is increasing.
Another 3,330 positive cases were reported in the UK on Sunday – the third consecutive day in which cases exceeded 3,000.
There were also five more deaths of people who tested positive within the last 28 days, bringing the UK total to 41,628.
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