If I find myself wandering around Richmond near the time of sunset I'm distractedly checking the sky for hopeful signs of pinky streaks. If it looks promising I'm invariably drawn to standing on top of Richmond Bridge to see what is occurring in the west. Some nights it just goes from flat white (like the coffee) to bruisingly grey, then darker, then black, nothing very interesting.
Tonight I was heading over the river anyway at around the appropriate time and lo and behold, it looked like a fiery sky was brewing over the railway bridge. Not the finest sunset but a new take to add to the collection.