I simply love this argument that London is too big to cover. Simply delicious. "People over here arent interested whats happening over there". Amazing. Do go on.
I live in one part of London. I'm originally from Scotland. I couldn't give a flying toss what happens in 90% of the rest of the capital. I'm not alone in that.
I'm sure this exists to a limited degree in most major cities. There are parts of Glasgow I'm interested in hearing about and other parts I couldn't care about. But the difference is that, because network news is still London-centric, the fact it's Scottish news gives it a distinction.
It would be good to hear about all the community stuff going on in London but that's not going to drive huge amounts of advertising. And I accept the concept of people not knowing what they want - but TV was invented at a point when the only competition was radio, and satellite TV really came to the fore when it had the clear USP of sports programming, before then no-one really cared. And the internet of course was almost certainly made popular by - frankly - porn.
Nothing would make me happier than to come home to a TV service that would tell me exactly what's happening in the capital and what I need to go and see, but most people aren't of a newsy mindset and just want to be entertained. Frankly, running repeats of Channel 4 programmes makes more financial sense. It's for Ofcom, if they're not happy with the repeated requests for a change of format, to cry foul and let someone else have a shot (should they be interested in the first place).