Angelina Jolie took a helicopter out of London today, just one day after arriving in town with son Maddox. She appeared to be alone for her chopper trip, but she did spend time talking to the crew before taking off. Yesterday, a Saint Laurent-clad Angelina jetted off to London after wrapping up work in LA. Before her trip with her eldest child, Angelina made an appearance at the D23 Expo on Saturday to promote her upcoming flick, Maleficent. The mother-son trip to England may have been part of a belated birthday celebration for Maddox, who turned 12 last Monday. Maddox wasn't with Brad Pitt and Angie when they traveled to Tokyo for work obligations earlier this month. Recently, Maddox had a scary brush with a stranger who was caught breaking into his family's car at a paintball arena parking lot in LA.