I might be losing my mind here BUT @Top Banana Racing do you have green stuff pads fitted to one of your vans? If yes where did you get them from?
Green stuff (EBC) have a pdf catalog of all of the pads and shoes that they manufacture I've got them fitted to my van, but I have Porsche calipers
When I looked 15 years ago they didn't do pads for our standard calipers. I looked after changing the pads on my first bay and in doing so found the brakes went from excellent to rubbish. The old pads were really old and I'm guessing asbestos based.
And http://www.ebcbrakeshop.co.uk/ebc-b...79-greenstuff-pads--front-dp2103_p1155306.htm The EBC part number is DP2103 – available from dozens of suppliers, Google it for the best deal.