[Tunnel boring machines]
beamjockey pointed me at this article and podcast, an American view of the project
After that I walked along the canal a few hundred yards to the top of Goldbourne Road, and saw some nice geese and took a couple of scenic photos
After that, as I was walking the last few yards to Portobello Road, I noticed a little reminder at a recycling point that the area isn't always as quiet as I would like...
Portobello Road was its usual self, but I didn't find many real bargains - some stuff for work from Poundland, some cheese, and a DVD from the Oxfam shop, and that was about it. But it was a lovely day and a nice walk, so I'm not complaining.