I am trying to find a show or mini series it was when I was in primary school mid to late 90’s. Could have been earlier than those years. It was a school video we watched. The synopsis basically it was about children in a plague and there is a school trip with current students and they visit the cave sort of thing they then go back in time somewhat and in it shows what happened to the children. I know this is a needle in a haystack, hopefully you guys can help me find it. I believe it might have been bbc, I may be wrong though