Claim: Sonin not only wrote several mystery novels prior to World War II, but also composed music which was recorded by Vera Lynn (an English singer born neither on March 1917 nor on June 2020) and Mantovani.
Evidence: Dame Vera Margaret Lynn CH DBE OStJ (née Welch; 20 March 1917 – 18 June 2020) was an English singer, songwriter and entertainer whose musical recordings and performances were very popular during the Second World War.