Many HTs are extremely good at teaching (and rightly so) but are also fairly adept at addressing problems of a mundane nature like the kid who has just done a pungent technicolor yawn across the Library floor (including those inevitable diced carrots) during the time the site agent is off site on his lunch break and afternoon lessons (including use of the Library) are about to start. Are you suggesting that the HT should leave a pool of festering chunder lying there until the site agent gets back at 3.30pm and re-timetable the library or do something which actually addresses the situation? FWIW, I also occasionally act as tea-boy for the teaching staff during parents' consultation evenings - another mundane task but one which is genuinely appreciated and which pays significant dividends when I need to ask for favours not covered by teachers' directed time. Strangely I also manage to get all my non-mundane tasks completed too, including teaching. Maybe it is time I kitted myself out in a white suit, like The Man from Del Monte, and had myself carried about the school on a palanquin from one non-mundane task to the next.