Excuse my quoting of the Rimmel advertising campaign, but after a year of living between Shoreditch and Hackney, I can safely say there is DEFINITELY a "London Look". To fool people into thinking you are a real Londoner this S/S London Fashion Week do some of the following things...
Invest in shorts; leather hotpants or denim cutoffs (the more holes, the better).
Be permanently attached to your iphone/blackberry/smart phone. A true London member of the fash pack can twitpic a picture from the back of the Bora Aksu show while maintaining a nonchalant air and bbming their friend standing next to them.
Wear some sort of platform shoe at all times. Some sort of black leather wedge boots. A la Acne (but more than likely from Primark). Another option are clogs. Equally clunky and noisy.
Master the penguin shuffle, a common problem associated with wearing long clinging maxi skirts.
Have a constantly grumpy demeanour.
Develop some sort of slash talent. Actress/model, musician/dancer. I like to go by the slash talent of Beyonce Impersonator/Blagger.
When possible, grow a moustache.
There you have it, if you follow these easy steps, you too can act like a you are the bees knees and the cats pyjamas for a week. 'Cause once fashion week is over, it's back to working behind a cash point in Topshop.