The 'Blitz' had not started when at least two of these photos were taken, so I've put them here.
Margaret St in the months before WW2 a fairly cheerful looking crowd filling sandbags and placing them untidily against the walls of the Education office.
Still Margaret St in the opposite direction. The trams had to squeeze past the busy scene. Would those sandbags protect the building?
Perhaps a little later the sandbags look more uniform in size and placement, but what about the upper windows? Note the 'Keep Left' bollards had light shields fitted.