tree shape against grey sky

A very dull, grey day in Scarborough today. As if no-one turned on the lights.
I was struggling to think what would make today's picture, with not a glimmer of 'good' light. Everything looked flat and lifeless. Then I saw this tree, and it's great and complex shape, looking like marbling on the colourless sky.
Very little has been done to the image from the camera, just the vignetting and little tweak on levels.
'Blipping' just needs looking.