Update on getting under car ,i have done it via trolley jack and stands,however i was right the undertray is actual metal ,mild steel or an alloy of some kind,it is not the origanal tary as there is a mismatch of blts fitting the tray ,from a standard coach bolt to a few T25 bolts ,one of which will need my grinder to get out as it looks like something as snapped off in there,around the edge are a few T20 bolts that i presume are the ones dor the correct tray ,all this to change the oil ...not putting this tray back for sure going to look or a genuine one to make live so much easier when changing next time as i do like to change my oil on a regular basis ....