You've been told to educate yourself, if you had a brain you would listen.
1981 spurs v wolves, exact same thing happened police opened the outer gate to relieve pressure outside caused by the antiquated turnstyles. Luckily enough they were on the ball a bit better then and closed off the tunnel, even so there were many crush injuries and a big stink between the police and sheffield wednesday with them both blaming each other.
The police then recommended that the capacity at that end be reduced, wednesday wouldn't do so, they also refused to modernise the turnstyles on cost grounds.
No more semi finals were held there after that until 1987, then forest and liverpool played there in 88. Peter Robinson complained before that game that we had been given the wrong end because we had far more fans and needed the bigger end, that fell on deaf ears. But that year an experienced copper was in charge.
What was differrent about 89 was the inexperienced fool who was in charge of safety and f*cked it up.
I've noticed a few idiots who still want to blame drunken ticketless fans turning up late for the crush despite all of the evidence to the contrary.
If I was a family member who had lost a son or daughter I would blame who I thought was responsible and say it loud and clear. I haven't heard one family member blaming the fans.
So, until I do, as far as I'm concerned you and the other idiots on here can roll your views up in a copy of the sun and shove them up your Rse. (to steal someone else's phrase)