I figured out where the mental image of the flying v came from. This ad, on the london underground, badly photographed on the way back from the pub last night (but which you’ll recognise if you’ve seen it).

Along with the recent news that Eric Clapton is selling his guitars made me think of his black and white classic beauty – so I merged the two in my head and had a b&w flying V in my dreams. It’s a relief to have worked it out. I thought, briefly, that my subconscious was rebelling against everything good and true.