London Assurance by Dion Boucicault. Directed by Nicholas Hytner. The National Theatre production presented by NTLive at the Coolidge Corner Cinema, Boston, MA, July 14. A bonus simulcast has been added to the NTLive lineup; on July 14th Coolidge Corner Cinema will, once again, simulcast Dion Boucicault’s comedy London Assurance starring Simon Russell Beale and…