Regarding the TPO ... yes unfortunatley they can apply to the whole woodland! I have one on my woodland too. While I cannot deny that I'd prefer not to have the helping hand of the local authority protecting my woodland from me, (it completely put me off buying it at first), in reality it has not proved to be much of a problem.
I drafted my own management plan that gave a fair amount of "wiggle room" and simply requested approval for a 5 year program of work to complete the activities described in the plan. Approval came through within a couple of months without any further "hassle".
I don't have the references to hand, but from this forum I found some good government documentation that outlined how the local authority should handle the TPO ... from memory there were several vaguely comforting sections of that that gave the impression that the handling of such woodland TPOs was a little different to a TPO on an individual tree ... some comment that active management and approval for long term "programs of work" shoud be encouraged and also if I recall a statement that the LPA should only refuse approval if they are convinced that the proposed work is not in accordance with "good forestry practices".
So for me, the TPO has not proved to be any great problem yet although that may just have been good luck and I may get a different opinion in 4 years time when it is time to apply again.
Adam.