London has many ghost stories and some are actually rather scary, like the Black Dog of Newgate. This spirit is said to haunt Amen Court near St Paul’s, where a wall from Newgate Prison remains. It manifests itself as a shapeless, black form slithering along the wall before it disappears into the shadows.
Considerably less spooky is the ghost said to haunt Pond Square in Highgate.
The story goes like this.
In January 1626, the writer and philosopher Sir Francis Bacon wanted to test his theory that ice could be used to preserve food, so he bought a chicken on Highgate Hill, killed and plucked it, and stuffed the carcass with snow. The frozen chicken had been invented, but the effort caused Bacon to contract pneumonia from which he died.
A sad tale, but one which doesn’t end there. For, ever since, on icy cold nights in the depths of winter, a shape resembling a partially plucked chicken has been seen flapping around Pond Square and squawking before vanishing spookily into the ether.
Yes, that’s right, London is haunted by the spirit of a featherless fowl.
Has there ever been a crapper ghost than this?
The Great Wen 
I take it you’ve never heard of the sock ghost of Muswell Hill…
Mwa-ha-ha-ha-ha-ha-ha…
Ha – I saw the headline and just knew it would be that story. But it bears repeating.
I nominate the phantom double-decker of Ladbroke Grove as the crappest ghost.
I once saw a flash of billowing whiteness at the Dog Kennel Hill end of Dulwich Hamlet’s Champion Hill ground during an near-uneventful first 45 minutes of football. It was a full moon as well. Admittedly my eyesight is terrible, and my imagination overactive, but still, come on! GHOSTY!
Emma from Lush saw a ghost on Primrose Hill when she was walking back to St John’s Wood from Camden Palace one night. Honest!