So a little update today, I tried to take the rear bumper off my car, as I want to get the fit a lot better on one side. But the first bolt I went to undo, snapped. So I'm going to get some new bolts, and remove it knowing I can replace them all. Whilst underneath my car I noticed a tiny little bit of surface rust along the edge of the join near the rear of the car, so I brushed off the worst, and went over it with some Kurust. Once I get the rear bumper off I will give it a serious clean. Oh and I also took my car to Top Gear in Bridport, and had them make me a custom cat back exhaust. It sounds a lot nicer, and the car seems to run a lot better now. I've had the diameter made slightly bigger as I plan on swapping the engine at some point.