The bathroom mirror in the opening shot has a small strap attached to it, so's to ensure it hits the correct sight-line for the camera to catch the reflection of Morrow's assault. The hand-mirror used to reflect Barbara Jefford at 7:34 is similarly tethered for Gerard Hely to find her (which takes some time).
Craythorpe is a Chief Superintendent. but Morrow initially calls him Chief Inspector.
(2:33) Sir Geoffrey refers to Morrow as Marrow.