Catching up on this one now... What exactly is Kelly's accent, BTW? Does it have a name?
I'll admit it's tough for me to decipher sometime, and this is after 30 years of Doctor Who (where admittedly I learned what a chav was). Is the accent a relatively recent thing in the UK? It seems weird to be speaking in a manner where you seem to NEED to put a lot of effort into speaking that poorly and mangling vowel sounds and inflections so far away from the British norm...
Mark
There is no "British norm" there's are a wide ranging set of accents. There's no effort when that is your natural accent.
I'm not actually sure what accent Kelly has, but Lauren Socha seems to have a very similar accent and she's from Derby.