Thousands of people have been heading to seaside attractions in the sunshine despite government advice to avoid social gatherings due to coronavirus.
One beach in Sussex is to close, while Lincolnshire's police and crime commissioner called for caravan sites and arcades in Skegness to shut.
PCC Marc Jones said there were "hundreds of thousands of visitors".
West Wittering Beach was being shut at 18:00 GMT after "thousands" of people turned up, the estate office said.
There are also reports of large crowds along the East Yorkshire coast.
Other resorts, including Brighton and Hove, were also reported to be busy.
'Arcades open'
Mr Jones said it was "time for everyone to be socially responsible or be made to be".
Local councillor Jimmy Brookes said it was "madness," adding: "Skegness is packed, cafes and arcades are open."
A member of the management team in West Wittering said: "The crowds were into the thousands ...."