ignoring this practically totally useless topic completely
when i filled in my mass & balance sheet for my skills test, the examiner accepted the aerodrome elevation i entered, however he did mention that i should have put in the density altitude of the aerodrome instead, as it was more relevant.
he then went on to tell me the story of an airline captain that took 3 friends up at Elstree, didn't get it off the ground properly and then ended up in the trees at the end of rwy08. if he'd considered the density altitude on that particular day he would have known he needed more runway.