© Shutterstock

Loch Ness monster - The Loch Ness monster is probably the oldest conspiracy theory in British history.

© iStock

Loch Ness monster - There have been reported sightings of a monster in the Loch Ness for hundreds of years.

© iStock

Loch Ness monster - Over the past century, much photographic and video evidence has surfaced purporting to show the Loch Ness monster. All of them have been dismissed as fakes, and nothing conclusive has ever been proven about Nessie.

© iStock

Paul is dead - The bizarre 'Paul is dead' theory alleges that Paul McCartney died in 1966 and was replaced by a lookalike.

© Getty Images

J.K. Rowling doesn't exist - She's the most commercially successful author in history, something which makes her a prime target for wild conspiracy theories.

© Getty Images

J.K. Rowling doesn't exist - Apparently that much success is impossible for one person to achieve. The truth? She doesn't really exist.

© Getty Images

J.K. Rowling doesn't exist - The conspiracy says that J.K. Rowling is actually just a pen name used by a team of writers and professionals who worked together to create the 'Harry Potter' universe.

© Getty Images

The Titanic never sank - This theory stems from the book written by Robin Gardiner, which states that the Titanic never sank, and was merely an insurance ploy to get rid of an old ocean liner.

© iStock

The Titanic never sank - Gardiner speculated that the Titanic was actually switched for another ship, which was sunk on purpose so that an insurance claim could be made.

© iStock

The Titanic never sank - He claimed that the actual Titanic was used for another two decades under a different name.

© iStock

Chemtrails - This one isn't specific to Britain, but there are a lot of people in the UK who believe that the trails behind airplanes are actually filled with chemicals with a specific purpose.

© iStock

Chemtrails - Some people believe that chemtrails are used to control the weather, and others think that they actually contain mind-controlling chemicals.

© iStock

The royal family are alien reptiles - This insane theory is a surprisingly popular one.

© iStock

The royal family are alien reptiles - Yes, according to some, the royal family are in fact shape-shifting alien reptiles. And they're not alone, the elite leaders of the world are all the same.

© Getty Images

The royal family are alien reptiles - Even Margaret Thatcher...

© Getty Images

Stonehenge was built by aliens - Stonehenge is a mysterious structure, and historians have yet to overwhelmingly agree on how it was built or what its purpose was.

© iStock

Stonehenge was built by aliens - Like with many immense prehistoric monuments, much of the confusion comes from the disbelief that human beings were able to create such vast structures during what was an incredibly primitive era.

© iStock

Stonehenge was built by aliens - The answer? Aliens. They must have helped in some way... just like with the pyramids.

© iStock

The Earth is flat - This is yet another conspiracy theory which sadly is not confined to the UK. There are actually a growing number of ordinary people and celebrities who believe that the world is flat.

© iStock

The Earth is flat - 'Geordie Shore' star Chloe Ferry is one such person. After a trip to Australia, she told the Daily Star "if the world was round then when you flew to Australia then you'd have to go at a downward angle. But it doesn't."

© Getty Images

The 'Manchester Canal Pusher' - Many people speculate that there could be a serial killer at work in Manchester.

© Reuters

The 'Manchester Canal Pusher' - The surprisingly high number of deaths in Manchester is what has sparked suspicion. In 2016, a Channel 4 documentary claimed that 85 people had died in the city's canals since 2008.

© Reuters

The 'Manchester Canal Pusher' - Despite the clamor from the press and the public, the police insist that the serial killer does not exist, blaming the deaths on tragic accidents and alcohol.

© iStock

The 'Manchester Canal Pusher' - But the mystery is far from over, especially after a cyclist claimed in April 2018 that he was pushed into a canal by a man who then prevented him from getting out of the water.

© iStock

Britain's Roswell - Taking place in Rendlesham Forest, near an RAF base, a number of army personnel reported saw unidentifiable lights in the sky and heard bizarre noises. One officer even went so far as to say he witnessed the landing of an alien aircraft.

© iStock

Britain's Roswell - Despite there being a number of reports, as well as alternate theories including unusual weather phenomena, falling space debris and a nearby lighthouse, no conclusive explanation has ever been given.

© iStock

Lord Lucan lives in Africa - Lord Lucan disappeared in 1974 after allegedly murdering the family nanny under the mistaken assumption that she was his wife.

© Getty Images

Lord Lucan lives in Africa - Lucan was declared dead officially in 2016, and it is thought that he committed suicide by drowning somewhere on the south coast of England.

© Getty Images

Lord Lucan lives in Africa -

However, his body was never found, and many claim to have spotted him in faraway locations such as New Zealand, the Congo and Argentina.

See also: Death by selfie: The world’s most dangerous places to snap photos

© Getty Images