Quoting David E Payne (spyder.king@yahoo.com.au):
It seems like Dave Prowse ended up on the dark side of George Lucas. Granted his character would still be dead in Episode 7 so of course he's not in the cast https://au.movies.yahoo.com/galleries/gallery/23079343/meet-the-cast-of-star... .....
Ah well. In July 2010, Prowse was banned from attending official Star Wars fan conventions by George Lucas. Lucas has given Prowse no reason, other than stating that Prowse "burnt too many bridges" between Lucasfilm and himself. That seems extremely odd, but then Lucas is an odd duck. At least Prowse is still famous all around the UK as the Green Cross Man. http://en.wikipedia.org/wiki/Green_Cross_Code#Green_Cross_Man During the production of Star Wars (New Hope), Carrie Fischer reportedly found Prowse's strong West Country (Bristol) accent so distractingly non-intimidating that she referred to him as 'Darth Farmer' when talking to other cast-members.