Depends on whether they are the slim fit version or the normal. The normal are fine but I find the slim fit are tight across the back of the shoulders and under the arms so I get a size up from normal.
Having just bought a new one I think I know the answer!!! Not sure if it will help you out tho! There are 2 sorts, one is slightly more fitted and the other is looser. I think the looser one is your true size and the lady said if it was the more fitted one to go up a size.
Not much help as I can't remember which styles are fitted/loose
Would agree with you there! I tried on a 14 loose and it fitted nicely and had to try a 16 fitted and it was still quite fitted so you def need to go up to a 14
Well Im quite broad but normally a 12/14. Bought mine both loose and slim fitting in the sale and worn both for the first time this week. Thank god I got a 14!! The loose fit, ermm fits and the slim fit is well tight. Not to be worn with my jods until I lose a bit of weight. Go for the next size up unless you are ultra slim and want it to hug your body.