Goofs

When Mr. Harrison is called by a woman because he is wanted by Mr. Corland, he is blowing into a glass vial on a side counter which was not there in the previous shot.

When Hill disturbs Michael Corland at the table, he holds a piece of paper. The paper swaps hands between shots.

When Sidney Stratton is caught outside in the rain trying to peek into Alan Birnley's window, he pulls on the brick windowsill in an attempt at getting a better view. The wall visibly shakes, breaking the illusion of a real brick wall.