A friend's husband is quite famous in the educational research and publishing world, he's written several books which have done very well. As I work in a connected sector, I've been invited to a celebration at his publishers in June. It's a rooftop party and I haven't the faintest idea of what I should wear. I'll be working all day so won't have too long to get home and change before having to get the train to the venue. I DON'T do heels. I'm 5' 6, a size 12/14 and can probably stretch the budget up to £200. How formal do you think this will be? I'm already starting to panic! 😬