The East of England Ambulance Service has just experienced its busiest ever Christmas, it's been announced.
On Boxing Day alone, the trust received more than 4,200 calls.
Demand was higher than expected, and has been compounded by the snowy conditions in some parts of the region on Wednesday morning.
Ambulance bosses are now reminding people to only call 999 if it's an emergency.
"This time of year is traditionally busy and we make plans and expect call volumes to go up," Paul Henry from the East of England Ambulance Service told ITV News Anglia.
"The NHS has experienced quite a spike this particular season, so it's something we're all facing. We're working together to try and make the system as safe as possible for patients."