Filming continued late into the evening at The Fitzroy Tavern, on Thursday night. The show's regulars where no-where to be seen as I gathered that this particular sequence is from the pre-credits opening of episode 4.
In a basement room there was a presentation on xml, mysql and php going on. I believe that this elaborate looking coven, who were huddled around the PowerPoint presentation, are key to the entire episode as they're attempting to use the natural lay lines (that also happen to be the pipes that transport the beer from the cellar to the pumps) that run beneath the boozer to call forth some terrible evil.
The inside of the bar had been completely re-dressed as there were beers on sale that I've never seen in any other pub. One of them was called Ayingerbrau and had a be-whiskered giant of a man on the pump. I later found out that this was connected to the main threat of the episode.
Also spotted were Jeremy Bentham, Rob Shearman and Steve Moffat. I understand that the major enemy of the piece, who is called The Ayingerbrau, will be played by these three men in a foam rubber suit, with Bentham taking the head and torso and Shearman and Moffat a leg each.
As the night wore on, and vodka was taken to equalise the effect of the terrible lager being consumed, the monster made his appearance and slowly consumed groups of men. But as no-one actually talks or notices anyone outside of their own group there was no reaction as slowly, one-by-one, each group was consumed by the monster.
There was then a terrible grinding and churning sound. No, I'm afraid this wasn't the TARDIS arriving, just people being very, very ill indeed through beer consumption.