There’s a new theatre in London. And there’s a London debut to mark its opening. The Boulevard Theatre, right-smack-bang-in-the-middle of Soho, is London’s most technologically advanced theatre with a capacity of up to 165, and featuring a full revolving balcony and auditorium! David Malloy chats all things Ghost Quartet, its London premiere and working with the creative team that drove the success of the pie shop Sweeney Todd, which ran for ages in Tooting, the West End and in New York.