Do let TfL know. It was half-term last week, there would have been more pedestrians than usual all week heading to the museum and park, but the tailbacks (stretching back some two miles in places) only occurred yesterday. A faulty signal still seems more likely to me, especially if there were still problems into the evening.

In any case, let's hope it gets sorted soon. Can anyone report on how it looks today? I need to know if I need to replay my route for tomorrow!