Do the people in the musical The Boy Friend talk in English accents?

Most of them do yes. Tony and Pervial both do, The girls (Nancy, Fay, Dulcie, Maisie and Polly) do, and Lord and Lady Brochhurst speak in a British accent as well. But the boys (Marcel, Alphonse, Pierre) are french along with Hortense and Mdm Dubonnet. The only American in the show is Bobby Van Husen.