For forty years it's been a mystery in the small Welsh town of Broad Haven.

In 1977 a class of pupils at the local primary school rushed in from the playground, hearts pounding with fear.

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Even under exam conditions the pupils' drawings of the UFO were all remarkably similar

They claimed to have seen a strange silver object hovering just beyond the playground.

The Headmaster, Ralph Llewellyn, thought their claims were just a practical joke.

But the pupils stuck to their story and even handed a petition in to the local police station demanding the incident be investigated.

One of the pupils, David Davies, still clearly remembers what the craft he saw looked like.

He told the Mirror: 'It was pearlescent silver-grey, approximately 40ft-long, torpedo, cigar-shaped, with an upper domed section that covered the central third of the vehicle which was topped with red pulsating light.'

The craft was described as silver-grey, 40ft-long and topped with a 'red pulsating light'

The spookiest part of the story came when the headmaster decided he'd try to catch the children out.

He sat the classmates down, in exam conditions, and had them draw out the 'craft' they'd supposedly seen.

Remarkably, the drawings were near-identical.

For the 40th anniversary of the sighting UFO enthusiasts made a pilgrimage to Broad Haven.

Author Neil Spring (far left) and this Swansea UFO group remain determined to get to the bottom of the Broad Haven mystery

But the sightings weren't just limited to the schoolchildren, and the area around Broad Haven soon became known for its UFO activity.

Many suspected that the military might have been involved, as there were a number of high-security bases nearby.

Author Neil Spring recently attended a village meeting where they discussed new revelations that there had, in fact, been a military base nearby which could have been launching an experimental airplane.

However members of that original 1977 class still maintain they saw a UFO.

Neil Spring is the author of The Watchers (Quercus Books).