I think I'm building up to that! The timings seemed odd at first (sitting in the traffic way back in the distance) but then I got the impression from this discussion that that junction was entirely controlled by pedestrians.

However, having sat in the Coop car park this morning, it appears that the lights can turn red without a pedestrian in sight - presumably to allow vehicles out of Perry Vale, but then we're back to the notion that the timings seem odd.

Okay, notebook, pencil, stopwatch and cunning disguise all prepared. Will hide behind the recycled clothes bins at the Coop and monitor the timings some day soon.