Professor Mike says he had long held the theory that the smaller bluestones which surrounded Stonehenge in a wide circle during its earliest phase, had started life as a monument in Wales.
But finding the site of a stone circle which no longer exists, 5,000 years after it was moved, is no mean feat.
The research started in 2010, with excavations beginning in 2012 but as they years went by they experienced many set-backs involving bronze and iron age circles which weren’t what they were looking for.
Mike, 63, did a deal with a TV company to film their progress in 2015.
Two years later, it was a despondent group led by Dave Shaw, who decided to excavate Waun Mawn, an “unpromising” marshy site described as “small and unremarkable” which had turned up nothing in the geophysics surveys.
... [goes on to describe finding it]