What we also know, and this is also born out by Baroness Casey’s findings, is that drugs, and alcohol, seem to increase the likelihood of people being violent and lawless. What we do not know is whether the violent people are drawn to the drugs or the drugs make them violent. But it is probably a combination of both.

“Cocaine seems to be part of a trend for keeping football violence going,” says Dr Martha Newson, an Oxford University anthropologist. “The effect is a change in the way (fans) behave – heightened aggression and heightened confidence.” She calls it a “lethal combination” and it explains what happened at Wembley.

“Drug use in football stadiums is a growing concern for policing officials,” the Casey report says and it talks of “hordes of ticketless, drunken and drugged up thugs who chose to abuse innocent, vulnerable and disabled people”. It is utterly damning. There will be the apologies and the promises to do better but there is a clear need for legislation and a crackdown.

One of the most telling comments comes from a barrister, Daniel Greenberg, who noted: “There is a surprising lack of enforcement mechanisms to deter such behaviour within a football context.” Greenberg gets to the heart of the matter. It is, indeed, “surprising” that there is not a greater deterrent.

Here is one example: Football Banning Orders (FBOs) can be given to supporters in relation to alcohol misuse where offences include “possession of alcohol or being drunk while entering/trying to enter a ground”. But, as the Casey report highlights, “there is no equivalent provision for drugs. While police officials have raised this with the Home Office, they have been told that there is not yet enough evidence of the impact of drugs on football crowds to change the legislation”.

That loophole has to be closed.

A light has now properly been shone on not just the damaging effects of alcohol at such events but of drugs. For far too long a blind eye has been turned to this kind of behaviour. But that can be no more. It is, as the report states, “appalling drug and alcohol fuelled recklessness” that “endangered lives”. There could have been deaths.

Wembley was an extreme example. But there are pockets of such behaviour around football and especially around the England national team.  As the report states – what happened that day “fitted a pattern of behaviour that has come to be associated with England supporters over decades” and how awful is that and how there now has to be extra vigilance and far greater punishment.

For too long drugs use has been the biggest problem among football fans that has not been properly addressed. No more.