My son's performing with Birmingham Royal Ballet in The Nutcracker at the O2
Look out for him - he's the tallest (I think) blonde, male party guest - he wears a cape, has a wife and two sons
And then he's a soldier in the battle scene and makes a brief entrance as a soldier in Act 2 - carting off the rat usually I think.
They all seem quite excited at the prospect - but the downside is having to get him to the O2 for 11am on Boxing Day morning (he could've got the coach from Birmingham, but that's 2.5 hours in the wrong direction

) - and then not seeing him again until late on the 30th
