Hi from the workshop! #StarWarsVII pic.twitter.com/9R7JGSfxlC
Update: The two builders in the picture has been identified as Lee Towersey and Oliver Steeples. The long time Star Wars fans were hired to built R2D2 for the movie and keep him running for whatever film conditions require of the famous robot. The pair have been building replicas of R2 and other Star Wars droids for years so they have the experience and the fan credentials to re-create the famous droid to meet fan expectations.