Am not sure that it was a case of allowing vegetation to grow, more passive than that. I think just over 100 years ago there were still sheep grazing on the hill. More housing, less farming and the trees returned which I think is great - also gratifying that we don't have to contend with zeppelins (I don't think that gun emplacement ever fired a shot in anger but others like it did and it was a deterrent).

I agree re line of sight though - it would be lovely to protect the view of the City skyline. There are plenty of other places to enjoy sledging locally.

I love that picture of the parade - it would be great to try and restore some of that character: lampposts and capitals. Surely not so hard, the fabric is still there.