Small Elephant Hawk

When I originally started trapping moths back in the early 70s in Cheshire I regularly got up to 15 Small Elephant Hawk in an evening, my dad worked in Warrington at a chemical company based near the old Greenall Whitley bottling factory and he would bring home 30 of them each week along with the many hundreds of other moths that he found around the place but until 2 nights ago I hadn't seen one since 1976!.