UCL was nice to look at but not very useful. Oxford was a bit dulled by the excitement yesterday. Very sad that filming was interrupted! They had only begun shooting the actors at 2pm and had to run at 6pm! Oh dear! Benny was not there but Martin, Gatiss, and Rupert Graves (Lestrade) were actors. Not sure if Moffat was there but I doubt it since there were no tweets from him. He wasn't there yesterday either, surprising as he is the writer for the episode.
I came back about 8 after eating dinner nearby and was surprised to see the street completely empty. Since yesterday they finished about 8:30 and were pulling things down still by then, I had expected at least one or two crew members still hanging by. However it was deserted, all the signs were gone, and the rest. I thought they just wrapped quickly until I read the twitter updates.