Walls built from furnace slag used to be common around Wolverhampton. This is less so now, but they can still be found. This one was by the former Bantock Park lodge next to Finchfield Road.
It was still early in the morning. Every few yards along the pavement there was another slug, all heading for the nearby long grass which would be their daytime refuge.
The unopened bud gives little clue of the colour the flower will be. If it is a wild plant, then yellow. If descended from an escaped cultivated variety, a more striking orange.