How bloody annoying is it when you turn up at a party in your favourite Topshop number only to find some other girl wearing it, and horror of horrors – the cow looks better in it than you? Well if that's annoying when you've spent 30 quid, imagine how pissed off you'd be if you'd shelled out over 1,000 pounds for a snazzy Roland Mouret frock and you weren't the only person wearing it. Pity then poor Jemima Khan and Trudie Styler, who both chose this dress to attend some fancy charity do last night.