The voluntary medical service St John Ambulance is in desperate need of a catering team to provide workers with refreshments during Pride.
The charity provides 100 voluntary staff to help at the carnival and festival in Preston Park, Brighton.
The volunteers work a 12-hour shift at the event, which attracts up to 90,000 people.
However, the organisation's chef has pulled out at the last minute leaving the service's doctors, nurses and ambulance crews without refreshments.
The charity has a mobile kitchen but it needs a chef and a catering assistant to operate it.
Terry Wing, lead officer for St John Ambulance at Pride, said: "This is the only opportune place our members have to eat or drink. They are not able to spend time in queues at the commercial catering outlets for the public around the park.
"I'm really desperate. I've got 100 volunteers working for nothing and the least I can do is put food in their bellies."
The catering unit is within a medical compound away from the public but still in view of the fun. The organisation has a budget to cover the food costs for any caterers.
Mr Wing can be contacted on 01273 748748.
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