Just played BFP20 - Bypassed Lehr, enjoyable all infantry scenario.
Anyway by SSR#1 all hedges are light bocage. Board 6 plus overlay BFP 6a only have hedges on them, so these are all light bocage. Board BFP E has both hedges and bocage, so the hedges are light bocage, the bocage is still regular bocage.
Seemed clear to us, especially since Chas states in his excellent writeup that some scenarios have both light bocage and regular bocage present.
The BFP E regular bocage takes all the level one hills out of LOS and since the buildings are all one story and stone, the only important difference between the two bocages is movement (1.5 + COT vs 2 + COT) and allowed fire along the light bocage spines.
Rich