Pointless and depressing I have no idea why this was even made, it just drags on inexorably into a durge where everyone is downcast and there is no redeeming feature at all. Some police are corrupt "wow what a surprise". Corruption is all around us but not all are corrupt, except apparently in the Yorkshire constabulary. Sorry Yorkshire police have a poor reputation but largely due to really poor leadership IMHO. This film and the rest of the series all show an overload of dour, depressing views of UK society and northern policing. No very entertaining and not especially factual either. No, in case you are wondering, I have no affiliation with police anywhere.
Probably the books are a better option that these films, personally I won't be bothering with either again.