oh really gurlz.....
woss wrong wiv ya ?
language changes slowly over time ( or quickly for that matter sometimes )
I always thought it was the Essex accent
The Beeb gave up the standard of English pronounciation and in keeping with its left wing sentiments held that any or every accent was 'valid'
Thing is some people like the south west accent or welsh lilt and there is no one who like Brummie or Scouse.I cant stand the Essex wide-boy accent but we have to accept it is All now Normal
see
http://en.wikipedia.org/wiki/Lenition
The opposite is fortition ( see
http://en.wikipedia.org/wiki/Fortition )
which is only found in the Devon/Darzet accent and people find generally incomprehensible