Nor should each syllable be sounded. It's 'Na'lee' when said properly in Estuary. And I think that is a hangover from the rural days.
A discerning ear should be able to tell the difference between Estuary and East London too.
My accent has softened quite a bit since I've moved out although it's still apparent where I'm from - I do pronounce my ts, at least some of the time - but as soon as I am back with my mates from the east end I start channelling Pat Butcher. It's so embarrassing and my kids find it hysterical.
On thinking about it you're right yes very good, I love to hear accents and they do make me smile sometimes.
My brother's been living out in Australia for 50 years his accent hasn't altered a jot, his terms of phrase definitely have.
I come from north London and have to say it must be about the only place in the country that hasn't got an accent, funny that, it must be a part of the same reason my brothers accent hasn't shifted after all these years.
The accent that represents squeaking chalk to me was some old lady, lady this or that I don't know, she was on the radio speaking about Charrrtam, I remember thinking where's that until later when Kent was mentioned. (Charrrtam isn't an exaggeration of how she pronounced Chatam).
I can take any accent and enjoy the difference, until we get plum I'm known to walk away from plum speakers before I say something, I begin to see a red mist whenever I hear plum.
Plum to me is the language for those stuck up their own, just in case I wasn't clear enough.
Regards ippy