For permanent schoolboys everywhere.
This neat gizmo enables you to see tube trains moving in real time. This morning you’d have seen mine limp into Wembley Park and then stop – trains do that when they are, in the word of the driver, “billowing smoke”. No photos though, as it just looked like an odd haze.
The Chesham branch appears to be empty – though this could be because it doesn’t have proper signalling compared to the rest of the network.
Thanks to the Londonist for this one.