Dame Judi Dench, that most British of thesps, appeared on SBS TV last week speaking of her love and admiration for the trees of her native land. She visited the ancient hulk of the Mary Rose, Henry V111’s flagship, named after his sister, which went down with all hands and examined – among other artefacts brought up from the sunken ship – a wooden nit comb, a sailor’s possession, still holding some lice from its drowned owner’s head.