30 firefighters called out to the Mark Cross Inn just before midnight.
East Sussex Fire and Rescue Service will carry out a fire investigation at a pub today 16 April 2017.
Crews were called to Mark Cross Inn public house in Mark Cross at 23.54 on 15 April 2017.
At the height of the incident, six fire engines were at the scene on Wadhurst Road.
Crews used firefighting foam, water and breathing apparatus.
Everyone was accounted for and a reinspection of the building is planned for 05.00.
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