Wednesday saw the official launch of the new Leighton Denny Expert Nails nail bar in Selfridges, Birmingham, and fashion-mommy went along to meet the man himself and get the low down on what I could do with my poor, brittle nails. Leighton is definitely the right man to ask. He is the four times winner of Nail technician of the year, and has been described as ‘The manicurist’s guru’, previously working as nail spokesperson for Marks and Spencer, Max Factor, Crabtree and Evelyn and Cutex. A well-known face familiar to QVC watchers all over Britain, Leighton brings nail knowledge to the masses with charm and a cheeky smile. My own…