It is understood staff were evacuated from the Post Office Depot in Birch Park Industrial Estate, off Huntington Road, at around 10am this morning (August 11). RECOMMENDED READING:A member of the public, who did not want to be named, said that he was visiting to collect a parcel and witnessed the incident. Workers were outside for 40 minutes (Image: Provided)“We were told that a battery pack had burst into flames in someone’s locker.” A spokesperson for North Yorkshire Fire and Rescue Service added: "Two fire engines attended reports of a fire believed to be a battery pack on fire in a cupboard. The Post Office has been contacted for comment.