Here is the highway code's rule for making a right turn:
Wait until there is a safe gap between you and any oncoming vehicle. Watch out for cyclists, motorcyclists, pedestrians and other road users. Check your mirrors and blind spot again to make sure you are not being overtaken, then make the turn. Do not cut the corner. Take great care when turning into a main road; you will need to watch for traffic in both directions and wait for a safe gap.
Remember: Mirrors – Signal – Manoeuvre
From my experience I wouldn't consider this a universal trend. People everywhere aren't developing this inability to drive properly, it's very much a localised tendency. Drivers in the Bournemouth area, what's going on here?! Is the sea air doing something to you so that even driving around other cars on a bend becomes too much to ask? You don't seem to be that bothered that sailing round a blind right turn on the opposite side of the road could have dire consequences.
Sorry to have a bit of a rant here, but it's difficult to enjoy driving when inexplicably you're faced with oncoming cars at every turn.