@richwood Thanks. Just had a look at your version with the flag. Excellent, and rather better than mine I reckon. I'm going to blame low light/high ISO for the off colours in mine :-)
@harveywilcox There isn't a button for this one I'm afraid. A sequence was shot at 12 (or was it 8 - I forget) frames per second, and then selectively merged together in photoshop. It takes a bit of time. I tried several sequences, but this one was the best.