Plastic carrier bags were not introduced into England until the 1980's. This episode takes place in the late '60's. Stanley could not have had one for his drug paraphernalia.
At a UK execution by hanging, the hood was always placed over the head of the condemned and then the noose, not the other way round.
The plastic syringe between the drug paraphernalia is a not the kind of syringe that could have been used in the '60s or '70s.
After speaking to the school photographer and learning about the girls reading of Black Beauty, Morse visits the mobile library, a BMC van. The registration has a J suffix denoting the earliest it could have been registered as 1st August 1970. This story, as is mentioned on more than one occasion, takes place in July of 1969.
Morse can be seen typing 'Friday 9th July, 1969' in a report, that day was a Wednesday.
The number plate on the car does not match the registration number etched on the door windows. Also the car has radial tyres fitted when it is much more likely to have had crossply tyres fitted.
Car registration is HZ which is from Northern Ireland, very odd for a Thames Valley police car.
'Endeavour' fans have pointed out that the registration number of the panda car driven by the opera-loving policeman had a secret relevance: 264Hz is the frequency of middle C (and yes, HZ does also signify a 1964 Tyrone registration).
'Endeavour' fans have pointed out that the registration number of the panda car driven by the opera-loving policeman had a secret relevance: 264Hz is the frequency of middle C (and yes, HZ does also signify a 1964 Tyrone registration).