Thanks gents! Bit of an update. I wore them all weekend and like I thought the 835L do stretch while wearing but every morning they go back to being nice and snug. Also, these are not for warm weather, it's been a bit toasty here recently and the weight of these makes them quite warm to wear!
Haven't heard from aahz, but sanibeldude is taking a step back from denim purchasing. He went through that crazy phase we all go through where he had to buy everything! I call it denimblog syndrome and I'm a doctor don't you know!
It prob has. That room I now take my photos in is a lot brighter than other parts of the house so that's prob why! Try and get a Japanese selvedge jacket from them as they quality is fantastic. I've had the two jackets for a couple of years and they've never lost their shape. Worth the extra few quid.