It’s February 2015 at Hampton Court Palace in London. Twelve-year-old Holly Hampsheir grabs her iPhone to take a photo of her cousin, Brook, as she walks alone through the majestic King’s Apartments. Snap.

It’s not until the following day that they discover Brook was not alone in the picture. A tall, grey, seemingly cloaked woman follows behind her. In a second photo, this strange anomaly is gone.

Was it a stunning image of a tortured apparition making a rare performance for the cameras, or something more... well... sensible?