As they were killed together, English law has a legal fiction that in the event of the order of deaths being indeterminable, the elder is deemed to have died first.
Legally therefore, Josiah is presumed to have died first and Wilfred momentarily inherited the peerage: and as a consequence the family had to pay death duty twice.
He was Professor of Bacteriology, at the Royal Postgraduate Medical School, University of London from 1948 to 1970.
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