We never get to find out too much about Alfred's past in Christopher Nolan's batman trilogy, aside from a few hints here and there (we know he was ex Special Forces for example) so in the following interview snippet released by Warner Bros UK, we hear for the first time the actor's invented back-story for the character, and how he came to be in the service of the Wayne family..
Warner Bros. Pictures’ and Legendary Pictures’ “The Dark Knight Rises” is the epic conclusion to filmmaker Christopher Nolan’s Batman trilogy. The screenplay is written by Christopher Nolan and Jonathan Nolan, story by Christopher Nolan & David S. Goyer. The film is produced by Emma Thomas, Christopher Nolan and Charles Roven, who previously teamed on “Batman Begins” and the record-breaking blockbuster "The Dark Knight." The executive producers are Benjamin Melniker, Michael E. Uslan, Kevin De La Noy and Thomas Tull, with Jordan Goldberg serving as co-producer. The film is based upon characters appearing in comic books published by DC Comics. Batman was created by Bob Kane.
The Dark Knight Rises is out now on DVD and Blu-ray. You can check out my review of the Blu-ray and the special features included
Here