The stacked timber is probably ready for allocation and collection by those who excercise the commoners right of estover- conferred right to harvest firewood that comes with certain forest properties.
The trimmings are (I think...)usually left to decay and sustain insect and bird life-at least that's what happens here (new forest)
I suspect if it's forestry commission land, the policy will be the same.
Some infected timber is burned and gorse is usually maintained and managed by controlled burning
Goat