I listened to BBC commentary and there was a description (for the non-eventing/horsy viewers mostly) of the different levels of eventing competitions and where the Olympics fits in.
I found Ian’s discussion of the frangible technology far more interesting! I thought he made his opinions rather clear, and then I bumped into him at our local event today and asked him about them. He was heading back to be interviewed for the BBC tonight; I did say I thought that might be one of the questions he might be asked!