This afternoon I did a trip to test out my motorbike (and it turns out the regular clonking noise has gone, so hopefully my chain maintenance has indeed helped!) and google took me off the normal route, along two sides of a big triangle, then back onto the normal route. Then on the way back, it just took me the usual way. And along that bit it had missed out earlier there was a fire engine and an emergency ambulance parked at the side of the road making everyone take turns to go around them. Looks like someone had a Bad Day™.