Where's the grub?

I've been in London for the weekend to meet up with colleagues to redesign our workshop submission for next year's conference in Beijing.

We had some lunch, caught up on the news and got on with the work. The cat decided that he was missing out on something and joined us. He looks dead miserable, but is a very tolerant old moggy!

We had to pick the weekend when the trains have been replaced by buses, so extending the journey by an hour. But in the process I have discover a "cheap" bus that may be useful in the future.