Corrie Christmas storyline - what the elf's going on?

There's a wonderful picture in today's Mirror of Chesney Battersby-Brown and Gary Windass dressed as elves, riding a bike.

And that's not a sight I think we've seen in Corrie before, not elves on a bike anyway!

Coronation Street are now filming their Christmas episodes so I guess this pictures's been taken from one of the festive storylines.  Looks like it might be fun!