The latest collection from Gok Wan is set to launch in Sainsburys stores on Thursday, and it is quite a departure from previous ranges. Where past Gok Tu collections have been very body conscious, with curve hugging dresses, pencil skirts, and flattering wide leg trousers, the new range seems to have taken influence from the high-fashion,  sports luxe designs of Alexander Wang, with a bit of scuba dress design a la Philip Armstrong thrown in for good measure. This collection is chic, but has a decidedly casual slant, with boucle bomber jackets, acres of khaki and soft grey and retro sports inspired styles all included. I think Gok has been…