When Connie wakes after spending the evening with Laurence, the dangling light switch is swinging as she awakes. It should have stopped swinging after her being asleep.
After 52 minutes and 30 seconds, Barnaby and Jones walking from behind after leaving the pub. Ben's tie flips over his right shoulder. The camera changes, and Ben's tie is not over his shoulder anymore.
After 38 minutes and 50 seconds, a silver Aston Martin (KX08PBU) parks next to a black Porsche Boxster convertible with the UK registration V12 AGA. According to the UK MOT register that number was registered to a white Jaguar F-Pace in May 2019 so the plates have probably been used for personal preference by the keeper of the vehicle rather being kept for one particular vehicle.
V 12 AGA would have been a standard number plate to a vehicle which was registered in 1999.