Pubs and restaurants will have to shut at 6pm and will not be able to serve alcoholic drinks.
Boris Johnson will publish data behind England's new tiers later in a bid to win over Tory rebels.
The singer says her actions were 'irresponsible' and she takes 'full responsibility' for the event.
Local authorities in England will be allowed to temporarily waive rules restricting retail opening hours.
Officers in England handed out the fines for Covid rule breaches in the first two weeks of November.