These screencaps from Much Ado About Nothing are thumbnails - click them for 1080p full size (video source: ShakespearesGlobe)
The Globe's Youtube channel has a clip from Much Ado About Nothing. Screencaps are above. Also, hellyescharlesedwards has some fun gifs from the clip.
Charles discusses Downton Abbey, Diana and Much Ado About Nothing in an interview from the Huffington Post.
This House will transfer to the Olivier Theatre next year. Casting has not been confirmed (Official London Theatre).