Rhys, Ive had the wheel off and can see the suspension adjuster is all the way to the bottom. As per my post on Bilstein coilovers its a common problem for them apparently... They unwind themselves after a long time. I dont personally see anything other then the suspension that could cause the front drivers side to drop bout an inch

The rest of the car feels solid and always has till its noticably dropped on one side. So Im putting it down to the suspension...