You ask why London has to 'stand for' anything. One response is that in fact it always inevitably does. One could say at the moment it stands for a complex mix of multiculturalism and financial power. Interestingly, that is a political mix of progressive and oppressive. What I'm arguing is simply that we should take responsibility for the effects of 'our place' around the world. To take responsibility for our embeddedness. If you don't want to, so be it. It does demand an imaginative engagement with our planetary interdependence and that can be quite challenging.