Every year, parts of Dartmoor are deliberately set on fire but it is not vandalism - it is a way of improving access for walkers and, crucially, encouraging the moor's huge array of wildlife.
The controlled burning of the moor, or swaling as it is termed, is a traditional land management technique which has been used to control overgrowth on Dartmoor for some 5000 years.
Swaling is a common sight at particular times of the year - from November to March. But this year farmers have had a very tight window of opportunity because of bad weather. It stops at the end of March, because of the bird nesting season.
Francesca Carpenter reports:-