Mike's not going to be happy with that, Robert!
What if you switch on ... but still haven't plugged into the mains? Wouldn't you then be testing as Mike described a couple of days ago?
(BTW: for the "purposes of debate", I'm just playing Devil's Advocate here; I have no particular axe to grind apart from a preference for simplicity, common sense, practical, valid, purposeful, and "real world" testing of the kit)!
