Fines of £800 for people caught at house parties have now become law. The powers for authorities to slap lockdown flouters with the fines came into force of 5pm Friday.
The latest coronavirus restrictions change comes into force as part of tougher measures to crack down on illegal gatherings during the pandemic.
The penalty will apply for groups of more than 15 people and will double after each offence, up to a maximum of £6,400 for repeat offenders, Home Secretary Priti Patel said last week when she announced the plans.
Parties busted by police in recent weeks included a gathering of more than 200 in a posh Kensington neighbourhood in London.
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