Firefighters have now left the scene of the Roudham farm factory near Thetford where a major blaze broke out this morning.

Eighty firefighters, which represent 10pc of Norfolk Fire and Rescue Service's force, were sent to the large-scale fire at a warehouse in Roudham Road near the Roudham Heath Industrial Estate which broke out at about 9.15am.

Nineteen fire engines, three of which are from Suffolk Fire Service, were sent to the Camp Farm site to bring the fire under control.

A spokesman for Norfolk Fire and Rescue Service said all fire crews had returned to their home stations by about 10.30pm this evening.

The structure of the warehouse, which is about 3,800 square metres, has remained largely intact after firefighters managed to ventilate most of the heat through roof lights.

The warehouse contained potatoes, grain and seed, all of which has been destroyed. A combine harvester has also gone up in flames but firefighters have managed to salvage a grain drier.

Fire engines were sent from East Harling, Thetford, Attleborough, Diss, Hethersett, Watton, Hingham, Long Stratton, Wymondham, Earlham, Dereham and Harleston. Engines from Suffolk Fire Service were been deployed from Brandon, Ixworth and Eye.

It is not yet known how the fire started.

Firefighters are expected to be visiting the scene over a number of days to dampen down.