Thanks for that. I looked at the length of the film they were to show, 122 minutes, being rather different from the 140 minutes of the Force, so thought it rather unlikely. I expected to go along, with my friend Roberto who was rather adamant it would be Star Wars, and 20 spotty chaps in their late 30s dressed as Boba Fett hugely unhappy behind their masks to have to sit through an Adam Sandler/Drew Barrymore Xmas romcom. I'll now watch the mighty Albion away at QPR.
*relief*
Apparently it was Heart of the Sea. Looking at twitter, a lot of people weren't happy because they had expected it to be star wars.