Hillwalker your allotment sounds like our new back garden.
Except ours is only 3 by3m.
We had some land like yours when we were in France. The first step was to cut the brambles etc to ground level, using a tractor, or similar, if you can get access with one . Rake up the cuttings and burn them. Then there's a selective weedkiller that deals with new growth of brambles, nettles etc which really works well.
You will have to wait until next year then rotovate and remove the remaining roots etc manually. Then add organic material before starting to plant.
Quite a challenge.
Jersey trip, some tips please.
How do I bring this issue up with our neighbours?


