Southall, isn't it, innit.
Good chicken kebab down in Southall, isn't it!
But those areas are notorious for sh!te driving, innit!
are they really? 
Yes, isn't it
Would that be why a someone noticed this woman driving in the manner she was?
Strange question, but ok - the reason they noticed the woman was driving in this manner, is because they were behind her, that ought to be quite obvious.
if this area is notorious for this kind of driving, why was the driver of the following car not driving in that manor? why are there not other videos of this kind of driving?
You are generalising.
I'm not generalising, the area is notorious for it. Cross on a green man at your own peril, it's russian roulette.
An area being notorious for something, doesn't mean all will, which isn't what I suggested.
What makes you think there are not other videos of such driving?
