Ngalengkepan kalimah di handap ieu: Davidson geus dirancang perangko pos pikeun Royal Mail Inggris urang, kaasup 1993 "Sherlock Holmes" set, "The Station", dina 2003 "British pub Tanda" set, opat tina 2010 urang "Bisnis jeung Konsumén Smilers", "Paralympic Games - Equestrian" dina "Olympyc Games and
Paralympic Games 2012" set, Séptémber 2018 "Heritage Pos: Surat ku Sapédah" set sareng perangko Natal taun anu sami.