The building has
                            maintained connections with Canada
                            throughout its history.  It was built
                            as the British headquarters of Canada's Sun
                            Life Assurance Company.  The foundation
                            stone was laid by
                            
                            Thomas Bassett Macaulay, of Sun Life
                            Assurance, on Canada Day in 1927.  In
                            1939 it became the Canadian Military
                            Headquarters in the UK, which remained the
                            case until 1947.  Between 1940 and 1947
                            physical connections were established
                            between it and Canada House next door.
                          
                          
                          
                          
                          In the years following
                            WWII the building played a number of roles
                            for the British government.  For a
                            while it was the Department of Culture,
                            Media & Sport and more recently the
                            Serious Fraud Office.  The building is
                            apparently listed but I have been unable to
                            locate that listing.