Off to London Fashion Week this weekend, and what to wear?

To dress for a fashion meet, I always browse outfits in my mind’s eye, placing myself at the scene, to discover which one makes me feel most attitudinal. I need to feel casual, unfashionable, and a bit tough. It’s only a sartorial mindset; I am not about to nut anyone. Never start trying on as this leads to too much analysis and anxiety can creep in.