Chocolate Cliffs!

Spent the whole afternoon on the shores of Southampton Waters watching the Clippers Parade of Sail escorted by the Warship HMS Illustrious as they prepared to set off on their Round the World Race. Fantastic atmosphere and 1,000s smaller craft and helicopters escorting the Clippers. Unfortunately it was too hazy to get any decent shots but as soon as I got home the skies cleared to a glorious blue - so an abstract blip today!
Can you guess what it is yet?