Maeght
Try thinking laterally here.
The police are the accountable agents of the state, which directs finances and controls them, whether you like it or not.
In any case of enforcement there are winners and losers. Simplistically, the state takes away a drink drivers licence and society is pleased about that, the driver himself, his family, friends and even his employers may not be. It inconveniences them and maybe impacts harshly on them in financial terms too.
The striking miners were acting unofficially, there was never a ballot, and by no means all miners wanted to strike. Those that didn't were subjected to threats, intimidation, etc. See my earlier example of the murder for just one example, a quick search on the interweb thingy will find examples of working miners homes being damaged their families being threatened etc.
And who directed, financed and controlled the striking miners? No the state or society for sure. Pickets too (like the police) were bussed about and organised in the course of the dispute. There were rumours in abundance at the time that money was coming from places like Lybia and the Soviet Union. etc. who of course had no interest in looking after the best interests of British society, their reasons were in fact the opposite.
To who were the striking miners accountable, apart from themselves. Whose interests were they looking after apart from their own!
And of course given what we now know about pollution and global warming, would we now want to support the burning of coal?
Those around at the time might remember that when police tried to get hold of the minutes of meetings, details of accounts, etc. from the miners union they could not do so, which is why the rumours about financing etc. persist. Again look it up on the interweb thingy.
Policing costs, names of officers deployed, etc is still on record though.
An enquiry now might throw up some very interesting stuff which would worry the left wing at least as much as the police. Which is why I think it would be best to let it lie.