Okay, so imagine you have a big list of different years, from a long time ago until now. Now, imagine that this list is all about something called British radio. That means it's about all the different shows and music and things that people have listened to on the radio in Britain over the years.
So, this list, or table, is kind of like a timeline. It shows you all the different years, one after the other, and tells you what happened in British radio during each of those years. For example, it might tell you that in one year, a really popular radio show started, or that in another year, a certain kind of music became really popular on the radio.
The table is important because it helps us understand how British radio has changed over time. We can see how different trends and styles have come and gone, and how things have evolved. It's kind of like a history book, but just for the radio!