I got a 36mm socket from halfords.I think the most frustrating bit of this job is removing the sh*tty plastic screw that covers that drain plug. I never tighten that up anymore you need a "special tool"Pair of vice grips took the cap off.A shifter on the 36mm nut the whole nut flexes.Got a 36mm from Halfords, at £14. Probably get on off Ebay for £4. Can't wait for days though...