Yes it's another sky, but when they're this good..

...you have to capture them; it's the law. What was it again? Oh yes, I recall, The Obligation To Photograph Dramatic Skies Act 2013, Section 6, subsection 1a; headed 'If it's up there, snap it'. Which needless to say, is not open to  the photographer's artistic interpretation and should not be taken out of context with the name of the Act. 
 
Five minutes later, all vestiges of the dramatism had gone and the clouds were just dark grey sausages in a grey/blue sky.