I watched a Christmas film a couple of years ago about a girl and a mother who live in a caravan on the girls school site, and they go to the mall one day and get locked in (maybe christmas eve) and have a little adventure in the mall over night!
Can't remember for the life of me what its called but remember it was a really lovely film! (based in England)
And suggestions? Thank you!

The Greatest Store in the World (http://www.imdb.com/title/tt0205983/)?

Yes!! Thank you v much! :)

You're very welcome.