I've no idea what a fiddler is doing on RAH's roof other than endangering him/herself and possibly anyone in the street below.
Yes, that one caught my eye too. Seems quite an oddity for the Proms. I mean, don't get me wrong, I think it's terrific as a staged musical (and the film isn't dreadful), but the music makes up a relatively small percentage of the total work.
I also noticed, with some dismay, that Eric Whitacre is being granted a concert. Is that a trajectory that means we'll get some Karl Jenkins / Einaudi next year???