In principle, I have no problem. However, I believe (but you will have to check) that NRW (the Forestry Managers) have declared flying drones over their land breaks their byelaws and the purpose of 'quiet enjoyment' of the forest. A number of English forestry organisations (Like the New Forest) have done the same.
The field we are using is big enough for you to practice away from our camp but I suspect most of us would not be happy if you were operating for long periods or near where we are trying to enjoy the peace.
We must also be careful (in all our activities) not to disturb wildlife, farm stock, locals or tourists; we want to be able to return to the site in the future without complaints.