Yes, that's sensible for the IR - maybe a little less for the sim detail itself, but factor in any revision training pre-test. The MEP LPC would normally be an hour or so, 2 would be excessive (again, think about any pre-test training though). If you revalidate or renew a ME-IR in the aircraft then you might as well add the couple of required visual items to complete a MEP test as well, the CAA generally advise this.