We do love our clouds and this example of Cirrus, popularly known as 'mare's' tails, is a cracker.
Gentlemen, here is the farming and tractor forecast for West Norfolk and Cambridgeshire. Cirrus clouds are often associated with periods of fine, anticyclonic (high pressure) weather as well with the more changeable weather found in depressions. When seen in the form of cirrus plumes this cloud type also accompanies major storm systems. So now you know.
So, if you are out in your tractor or up in your cherry picker keep your eyes on the sky and remember, you have been warned.
On the plus side they're made of ice crystals so get into the cherry picker or your Tiger Moth and tip some in your Gin and Tonic.