Hay Girl in the Big City: Toilets Behind the Pandorica

...(which really was a sign at the Doctor Who Exhibition!).
The streets around Olympia were almost deserted, but there were plenty of people inside the Doctor Who Exhibition - which is of two parts. There's a static exhibition of props and costumes and bits and pieces like how to make a voice like a Dalek or Cyberman, and there's the interactive experience, complete with 3D special effects and a video of Matt Smith ("wait a minute - you're not Amy. You're not even Rory - you're shoppers!"). The best bit was not that, though - the best bit was going through the doors of the Tardis into the real control room (although we weren't allowed to touch anything). There were little control panels for the children to use around the edge.
No-one else would have known it, but I went in costume as Sarah Jane Smith. I had the Tardis key and the sonic lipstick in my pocket, and the watch that scans for alien life forms (yes, I do have a mental age of about 9, why do you ask?). Mark was a Time Agent - though he looked a bit like Professor Yana when he was leaning on the rail round the Tardis console.

Oh, and while we were wandering around Southwark, we came to the exact spot where the Victorian cabbie was murdered by the Chinese, who then got into a fight with the Doctor and Leela, in the Talons of Weng Chiang. It's just outside the Clink.