Here they are - some screen caps from the BFI video and the pic at the bottom is taken very near the Donmar. Some fans suggested this was a journalist (of course!) but it was taken after a performance - a bit of an odd time to meet a journo, and also the height, the hair and the body shape are right to be the JArthy.

http://hiddlestonandtom.tumblr.com/post/84322959921/redskye572-inspired-by-hiddles-december