Not so much prnonunciation as 'voice fad', but here in the us the epidemic of vocal fry, whiny &, nasally voices, and 'talking like an 11 year old' (= contrived 'child-like-wonder-ness') in radio, esp the so-called 'public' radio (aka 'npr'; usually university owned/operated, stations so not actually public) has become overwhelmingly annoting. Seems to be related to the cult of self, constant need to be noticed, and 'announcer as celebrity'. This disease has spread to most people in the general population as well, esp. female, under 40 or 50. Amazing how fast the 'voice' of a country can change in just 5-10 years.
I note that BBC still attempts to use proper English, following the now apparently outmoded idea of newsreader as unbiased medium not meant to be the star. At least the little bit of BBC I can get (since they ditched shortwave). If this vocal fry and nasally-ness begins to creep into the UK I'd advise a massive public movement against it as soon as possible!
Geez, I ought to actually post something velo-related here... have been slacking with the Cat pictures and now this!