... I noted that a small area of heather and gorse just north of Treen Common enclosure has been burnt back as well, which has always provided another option to grazing.
But don't forget the attempt a few years ago at 'burning off' that got out of control, and burnt a lot of the stones at Tregeseal. The lichen was irretrievably damaged on that occasion.
So yes, fire is a tool, but one that must be used carefully and sparingly.