Got mine today as well, well impressed with it. im 5ft 11 and 14st and went for a xl size, nice and roomy and really comfy.
What size chest are you Colin?
I ask because after seeing the post, below I contacted Kevin regarding XL being suitable for a 48" chest with room for other layers....wondering if XL would be too snug....?
If it's any help to you, when I spoke to Kev my XXL was 27" from armpit to armpit.
Cheers
Tom