Burberry Trenches - how do they fit?

Hi ladies, I was wondering if one of you could help me out...

I'm thinking of ordering a Burberry trench coat (a shorter, knee-length version), but I'm not sure what size to order. I've been looking for a size guide but I can't find a good one (the stores say one thing, burberry.com says another...). I usually buy coats in a size 8, so I was thinking of ordering a 10 in Burberry because they seem to run small, but should I order up even more? I'm about a 6 in tops and a 10 in pants.
 
They have two sizes listed, the UK size and the US size. Go with the US size. I think a 10 US (12 UK) would be fine because you want a little room for your clothes underneath.... If you are a 6 on top you may even want to buy an 8 because it's only the top part that needs to be slightly larger....