Devon and Cornwall Police think the fire may have been started deliberately.
Detectives are appealing for anyone who may have seen any suspicious activity in the area either in the late evening of Sunday 12th May or the early hours of Monday 13th May.
More top news
Showers on Saturday and Sunday, some heavy, but sunny on the bank holiday
Some cloud tonight, showers Saturday and Sunday, sunny on Monday
A community vegetable patch in Bath may be forced to move because the local council says it doesn't fit in with the heritage surroundings.