Previous children's Proms - we've been to two Blue Peter proms (I think last year & the year before? but it may be two-out-of-the-last-three years, can't quite remember).
The first one had a theme of Music and Magic and (with a kind of luck you just don't appreciate till later) I happened to phone for tickets immediately after someone had cancelled their box booking. So we had marvellous seats. The Music was fairly what you'd expect - Magician's Nephew & that - but again very well played; and, while it played, some breathtaking magic - completely convincing levitation, etc. - was performed on that stage in the middle of the arena. It was all wonderful. And there was a Dalek too, and the Dr Who theme tune was played.
The next time the theme was the Sea, I think, and we had sweltering up in the ceiling tickets, and not nearly the same effort had been put into the visual excitement element. So we enjoyed it but it wasn't a "we must go to this every year forever" experience (as the first one had been).
This one fell a bit between the two: the monsters were not quite as spell-binding as the magic, but we still loved it.
PS What was it that someone shouted at Catherine Tate? It was a shout of desperate appreciation - something like COME BACK DONNA - but I couldn't make it out. The people behind us laughed a lot so they must have understood.