Corrected entry: After Sam wakes up on the building site, the Police Constable replies sarcastically, "You were driving a military vehicle", when Sam claims the car isn't his, and that he was driving a jeep. This isn't strictly true - the Range Rover went into production in 1970, and the Land Rover Defender into production during the 1940's, so it's not implausible that Sam Tyler could have owned/been driving a "jeep".
Corrected entry: Throughout the series, you can see some houses with satellite dishes. They did not have satellite dishes in 1973.
Correction: It is implied that Tyler is dreaming, and is not really in 1973.
Corrected entry: The bicycle seen being ridden across the shot in the final scenes by a young girl is a Raleigh Wisp, which was a model introduced in 1983 so would not have been available at the time the drama is set - in 1973.
Correction: The series is NOT set in the 70's, merely an imitation of the 70's, a purgatory, so historical facts do not apply.
Corrected entry: Sam conducted the taped interview, stating that it was 'Wednesday 16th March'. In 1973, 16 March was a Friday, not a Wednesday. However, 16 March was a Wednesday in 2005, the year the episode was written.
Correction: The series is not set in the actual 70's but a purgatory for dead or dying coppers meaning that it would not follow the exact timeline of the 70's.
Corrected entry: In series two, episode two, why didn't they just pay Dickie Fingers a visit? That way he wouldn't have ended up on the mortuary slab, and any info he had could still have been put to use.
Correction: Just because you'd do something different to the way the characters did it doesn't make it a plot hole.
Corrected entry: The episode has a specific date attached to it: 16th March 1973. Yet in the episode, Austin Allegro police "panda" cars can be seen. The Austin Allegro did not go on sale until 17th May 1973, exactly two months later.
Correction: In the series finale we discover that Sam's seventies world is in his imagination so this and many other mistakes will be due to Sam misremembering his childhood in this era.
Corrected entry: Some of the houses have double glazing even though this would not have been available in 1973.
Correction: Rubbish, my parents' house, built in the late sixties, has always had double glazing.
Correction: Nobody in the UK would ever refer to a Land Rover or Range Rover as a jeep. Even these days Jeeps are not common in the UK; in the timeframe of the series privately owned Jeeps would be practically unheard of and nearly everybody would still associate Jeeps with the military. What the policeman says is hardly unreasonable.
Tailkinker ★