This airy sky was photographed at Newark on Trent earlier this year. If you look closely you should be able to see a "false sun" which is normally echoed by a similar "false sun" on the other side of the actual sun. I don't know the scientific name but as far as I know this is a similar effect to a rainbow where light is reflected (refracted?) through water vapour in the atmosphere. Hopefully somebody will put me right if I have got it wrong.