London Ambulance Service warns Jubilee crowds to wrap up
London Ambulance Service says it is preparing to treat people affected by the cold while standing outside for Jubilee events.
A spokeswoman said with the cooler temperatures this weekend there was an increased risk of hypothermia among those spending long periods outside.
The ambulance service has drafted in extra staff, with many using bikes and motorbikes to get around road closures.
St John Ambulance will be at about 80 events in London.
The so-called "booze bus" and alcohol treatment centre in Soho, central London, which is normally open at weekends, will be in use for the whole bank holiday.
But a spokeswoman said alcohol-related casualties were not expected to be the greatest problem.
"The biggest challenge will be that it is four days," she said.
"We are expecting a range of issues, including people standing waiting for too long for different events to start. It's quite cold and we advise people to wrap up to avoid hypothermia."
Temperatures are forecast to range between 9 and 12C on Sunday.
St John Ambulance will have treatment centres in central London and people are encouraged to visit them with minor injuries rather than calling an ambulance.
Ann Cable, commissioner of St John Ambulance London, said: "If it had been last weekend we would have been expecting heat exhaustion, heat stroke and wasp stings, but hopefully it will be mainly minor injuries from long days outside - headaches, blisters and that sort of thing."
She said 1,600 people were volunteering over the long weekend, many stationed at street parties.
The Red Cross is providing first aid cover at 40 events in the south-east of England over the weekend.