Ghostly figure caught on camera standing over Parliament glancing at the River Thames

A ghostly figure was caught on camera in London standing outside Parliament on New Year's Eve.

The spooky image shows a transparent figure dressed in modern clothing gazing out over the Thames near Westminster Bridge in London.
Dailymail reports that professional photographer Jules Annan took the image on New Year's Eve  - but only noticed the ghostly apparition when he got home.
Jules said:

'Nothing like this has ever happened to me before. I can't explain it.
There was no one there when I took the photograph and it is not a double exposure or a long exposure.

What do you think?