Those tall hedges are ubiquitous. They stop you from pulling over, so if there's anything coming the other way, you're stuffed. Also, you don't get to see any of the beautiful scenery.
I expect they're handy in winter as they'll protect the roads from snow, assuming they have some foliage on them.
On the way back, we went via Hereford so we could see the cathedral. We might not have done so had we known we'd have been on roads like this for fifteen miles.