Just thought I'd post this for anyone who didn't manage to get the free preview screenings.
Went on-line to the VUE cinema website and found that my local vue (Worcester) is having a gala event for the film 10 days before general release.
It looks like tickets are £10. You also get a free Shaun of the Dead DVD and Hot Fuzz poster. So pretty good all in all! I am not sure how many other VUE cinemas are doing this, but can definitely vouch that Worcester is. Worth a look I'd say!