My last post asked what was causing the inferno effect. It was not, as suggested, an explosion in a marmalade factory (thanks to Rolling Harbour for that wonderful suggestion!), but a spectacular cloud formation illuminated by the rising sun.
Here are some more pictures. My most erudite reader Charles suggested from the first photo that they could be wave clouds, formed by atmospheric internal pressure. Now that you’ve seen the full pictures, Charles, can you confirm that? I’d like to learn more about clouds, so this could be a good introduction!