Hercule Poirot British government, including foiling the attempted abduction of the Prime Minister. Readers were told that the British authorities had learned of Poirot's keen investigative ability from certain members of Belgium's royal family. After the war Poirot became a private detective and began undertaking civilian cases. He moved into what became both his home and work address, Flat 203 at 56B Whitehaven Mansions. Hastings first visits the flat when he returns to England in June 1935 from Argentina in "The A.B.C. Murders", Chapter 1. The TV programmes place this in Florin Court, Charterhouse Square, in the wrong part of London. According
Montagu Mansions Montagu Mansions Montagu Mansions is a street in the City of Westminster, in the Marylebone area of London, England, that is made up entirely of mansions flats and in World War II was one of the locations used by the Special Operations Executive. The street runs from York Street in the north to Dorset Street in the south. It is crossed only by Crawford Street. The street is entirely made up of mansion block flats. Special Force Headquarters rented offices and accommodation in Montagu Mansions during the Second World War. The Special Operations Executive was located in nearby Baker Street.