I have just discovered the answer to that age old and much debated question of physics : “where is the best location on a slightly sloping toilet cistern to place a very full jumbo cup of freshly made tea in order to allow it, when it slides off the cistern, to bounce off the flush handle and perform an elegant and perfectly executed 360 degree somersault to ensure maximum splash coverage of the white walls, floor tiles, loo roll, towels on the towel rail and dishevelled, slightly stunned, half asleep prospective drinker”. Humph.