Does this photograph prove that ghosts really exist?

Ghost hunters from Cheshire Paranormal Society (CPS) took this photo during an investigation on the historic Packhorse Bridge in the village of Caergwrle, near Wrexham, the scene of a number of sightings. Does it show a ghost?

This ghostly figure is standing on the Packhorse Bridge, Caergwrle, near Wrexham, according to Cheshire Paranormal Society chairman John Millington. At the time members hadn’t realised what was apparently standing on the bridge in front of them, but some group members had reported feeling uneasy and other paranormal activity was also recorded, such as so-called orbs of light. Through further study and assistance from members of Hope and Caergwrle Heritage Society, it’s thought three ghosts haunt the bridge; a young girl and two women.

Members believe this photo shows the ghost of Squire Yonge who, the history books say, was well known in the area 300 years ago. The group also believe that the sighting of ghosts on the bridge could be to do with a former burial ground in the area and that the bridge was the access point.

Weird looking spectral image if you ask me.
Could it be an image of a ghostly apparition? or a smudge on the lens?