So ever since I have had the car, it has had an oddly fitting RHS front quarter panel.
Initially I figured it was a pre and post 89 thing, but nope.. all guards same. After a bit of head scratching, I figured out that it was s replacement guard that had come from a car with this panel modified to suit a bodykit or... something.
When I stripped the filler away, someone had attacked the panel with an angle grinder. So I bought another one - and it fits. Nothing bolted up in the photos, but nosecone matches up perfectly.