Posting in a Facebook group, he said: “In TV dramas there is always ‘artistic licence’, however when a drama is based on real events and claimed to have been thoroughly researched you would expect a degree of accuracy.
“On the ITV drama White House Farm, which is based on a tragic real life event in Essex in 1985, a large part of the story concerns the police response and investigation.
“It’s quite frustrating to see that no effort was made to research Essex Police vehicles at the time. In 1985, Essex Police had very distinctive markings on their vehicles and primarily used Ford vehicles such as the Granada and Sierra (though there were a few Maestro pandas and of course Range Rovers on the motorways).”