Bit of an update, ive fully overhauled the 4 pot calipers now, new seals + piston gaiters, clips etc, got some 2wd front discs and mounted it all up so just the rears to do now. Had a nightmare trying to find the 2wd discs locally so on the off chance i phoned a friend who works for vauxhall gave him the details, ten mins later he phones back as tells me that not only have they got 3 sets in but they are old stock and should retail at £117 they sold them to me for £23.50 a set so i brought all 3