https://www.youtube.com/watch?v=jy7Z8YIjjYA

What is the music they play between 10 - 19 seconds. I know the tune but can't for the life of me think what it's called.

The Nutcracker op 71

is it a snippet from Dance of the sugar plum fairies ?

It's not that. If it is I can't find any video with that tune on it.

Danse des mirlitons
From the Nutcracker

Just checked three different videos on youtube of that and it isn't that. Sounds similar but it's a different tune.

Léo Delibes Sylvia Ballet Suite
https://www.youtube.com/watch?v=V44rXWtx-18

Finally. That's the one. Thanks very much Electra. Happy Christmas to you.