(It's essentially the same as a Mummers Play - the plot is fixed in its essentials, certain bits of dialog are traditional and must be incorporated. (Oh yes they are...oh no they aren't...oh yes they are) Outside that anything goes. For example in a Mummers Play by the Chingford Morrismen that I say tonight The Turkish Knight, Slasher used the name Bin Laden. It didn't stop hik being brought back to life by the Dictor after being slain by St George.)

Proper pantos, like proper Mummers Plays, are primarily in verse, but slip over into prose much of the time. Modern pantos tend to get it the other way round.)

We haven't had a Fairy Queen or a Demon King yet.