Last week I had the most amazing email pop into the inbox. ‘Would I like to take part in a special question and answer session with Stella McCartney and the Vogue editor Alexander Schulman. This was taking place at Selfridges, London, as part of the Stella McCartney takeover to commemorate the launch of Stella’s new perfume, L.I.L.Y. So last Wednesday I took my seat in the fabulous Ultra lounge with a glass of champagne to listen to Stella musing all about fashion,  her wonderful career, and also a little bit about family life. Here are some selected highlights. On her starting points for her collections I take my last collection…