According to the Official Press Release, the Water for Elephants Premiere in London will be hosted at the Vue, Westfield London on May 3rd. Rob, Reese, Christoph and director Francis Lawrence will attend.
Certificate and Running Time got mixed up.
Certification: 12A More info on this certification
Running Time: 115 Minutes
Here is the Official Press Release
What does the ‘12A’ category mean in practice?
Children under the age of 12 will be able to see a ‘12A’ film at the cinema if they are accompanied by a person of 18 years or over. The adult must watch the film with the child or children and not just pay for the ticket.
So, I guess we now have the movie's confirmed running time of 1hr and 55 minutes. Woot!