At filming today Benedict held up a sign saying that he wasn’t on twitter. This is the best shot I could get (the boom alas gets in the way) but hopefully you can make out most of the message which I think read:
"Im Benedict Cumberbatch. I’m not on twitter. Never have been ever."
Posting with Benedict’s express permission as he very much wants to get the message out there that he is not on twitter so I’d appreciate it if you could re-blog/retweet.