The ships mentioned were the Parent Establishments, responsible for pay etc., not necessarily where they actually were. A bit of research has produced the following details:
Re: Bethune-Williams
Listed as being Missing, presumed killed after the loss of the Norwegian merchant ship RINGSTAD which was torpedoed and sunk by U-333. Details of the loss may be found at the excellent warsailors website:
http://warsailors.com/singleships/ringstad.htmlSee also the U-boat website at:
https://www.uboat.net/allies/merchants/ships/1286.htmlwhich adds the additional information that Bethune-Williams was a bomb-disposal expert, and was travelling to Ottawa
re: Clarke
Was killed in an air crash. He was serving as a pilot with 767 Squadron, flying Fairy Swordfish aircraft, and based at Arbroath. On 13 May 1942 his aircraft (K8434) was in a mid-air collision at 2,000 feet with another Swordfish (L2838) and both aircraft crashed at Shandford Farm, Finavon, Fearn, Angus, with the loss of all crews – six men in all (source of this info:Sturtivant & Burrow '
Fleet Air Arm Aircraft 1939-1945'