Update (28 June): DfT now says the delay is because they are currently lacking validated data from the Metropolitan Police for November and December 2016. As Met data makes up around 15% of the GB road casualty data this made publication in June impossible.
The below article by Bruce Walton, Road Safety Analysis, explores the late decision by the Department for Transport to delay the publication of the main 2016 collision and casualty results, Bruce Walton explores why this has happened and whether this is a one-off or new trend.
Full article here: Old certainties and new challenges: GB Road Casualties
PACTS finds the delay extremely worrying and believes that this delay further demonstrates the case for a Road Collision Investigation Branch.