I actually couldn't get the hush trainers to fit me at all last year, and like you, tried the M&S ones as well and had to flog on ebay as felt the toe box was too shallow. I ended up with Air and Grace Lepoard trainers, which I do find very comfy. I was an 8-8.5 before, but I'm a 7 now. And I would swear I didn't have fat feet before!