Circle the date Friday 29th October on your fashion calendar, for this is the day that the ‘White Stuff’ hits Birmingham. Now, before you start to think about putting salt on your paths, or get ideas I’m thinking about some dodgy drink  milk campaign from the 1970’s, let me make things a little bit clearer. I am talking of course about ‘White Stuff’ the ultra cool and stylish fashion and lifestyle store that is set to open on Cannon Street next friday. Cannon Street, already a chic style mecca and currently home to Hobbs, Jigsaw and MAC will now have a new ‘must visit’ store, and Fashion Mommy is getting…