After a brief research I've read that my car should not have LSD from factory due to it being fitted with traction control as standard. I'm unsure if this info is correct or not as my car hasn't singled on me as yet and I'm yet to look under it and find out otherwise. I believe I have IRS & LSD with the options
to turn traction control on and off. Does that sound right? Secondly if I was to want to upgrade to higher ratio diff gears will any 28 spline b/w gears fit? Cheers.

not to se about the first question with traction and that but if you upgrade your diff the 28 spline axles should fit fine most of the fords are 28 spline unless extra work has been done or higher performance veichle from what i know! but you might want to looking into changing your speedo servo gear also if changing your diff as the speedo will be out! i found with mine i went from standard diff 3.45 to 3.90 ratio and speedo was out around 10-15km out and had to put a servo gear with 2 extra teeth on it because the auto place i spoke to said its around 5km per tooth or something! either way speedo is all good now! hopefully this was abit helpful!