In reply to pasbury:
I think that, due to fear of litigation, it's likely that, at a national level, on smaller roads, roadside trees may have less overhanging branches than they once did.
If you asked me to come up with examples, I probably could, but, just like using an episode of extreme weather to 'prove' global warming, it proves very little.
More money has been put into attracting tourists to the countryside in the last few decades, and so increased signage, visitor car parking, and cafe developments have altered the landscape.
Vehicles are often bigger than they were 30 years ago, with implications for taking up space whilst driven and/or stationary.
I suppose those individuals who view landscape in terms of ultimate/ bucketlist / must do will be more 'destination' than 'journey' orientated, and will be arguably less likley to notice the imapct of such stuff, and will imagine the landscape as something beginning the other side of the stile from the road.