I remember it well.
I was cleaning my car and my great uncle had been shopping and came back saying he had heard the IRA had bombed the Arndale.
I went to the city the day after and couldn’t believe it. The main thing I remember is all the glass everywhere and the noise of the alarms in what is normally a busy area was weirdly quiet apart from the alarms.
I went a few times that week just to get my head around it. I remember buying a car radio from a shop at the bottom of Deansgate which was about 1/2 mile as the crow flies from the truck which blew up and they said everything fell off their shelves.
At least no one was killed.