I’m a bit late on finding this, but it is indeed 30 years since Live Aid.
My memories were listening to it simultaneously on the radio whilst watching it on TV. What you have to remember is TVs sounded rubbish in those days, or at least our one did so the experience of a simulcast was something special.
Anyway, enough about the ten year old me, sitting at home awestruck between the TV and the hifi system. Thomas Dolby’s account is much more interesting..