It looks like Matt Smith has been filming for SJA this week

GilaGora

07-05-2010

One of the actors appearing in the episode(s) has been tweeting about it.

http://twitter.com/FinnJones

Looking forward to it!

k9fan

07-05-2010

Thank you, I am so looking forward to the new series.

carl.waring

07-05-2010

Ben what's-his-name also mentioned it on Twitter.

crazzyaz7

08-05-2010

Thanks for this tid bit!!! Can't wait!!! Katy, Matt, Liz and RTD!!! Brilliant!!!!