Quiz: Can you work out the musical when we've swapped one letter?

Read the rules to understand what's going on:

This time around, we've substituted a letter into a musical title (and taken one out) and created an entirely new show.

From there, you have to work out which letter has been added.

So to reiterate – don't write in the title of the show – just give us the single letter.

Let us know how you get on!