Blue Moonrise at Sunset

I thought I'd have a drive out to a good sunset spot as the evening looked promising. In the event, it wasn't anything spectacular, so I just took a few silhouettes (see extras). When I turned round, I saw that the moon had risen behind me. It is a Blue Moon because it is the second full moon in a month. It's the third Blue Moon in 4 months. Makes a mockery of the phrase Once in a Blue Moon