As passengers on BOAC Flight 777 , Clarke 's only daughter Rotha ( Hutcheon ) and her two young daughters were killed by enemy action over the Bay of Biscay on 1 June 1943 . Other passengers included the actor '' Leslie Howard '' . Clarke subsequently commissioned a stained glass window at St. Michael 's church , Llan Ffestiniog , Wales , to remember the women and children killed during World War II
BOAC Flight 777
BOAC Flight 777
Geoffrey Rothe Clarke