Prehistoric man navigated his way across England using crude sat nav

Historians have claimed that prehistoric man navigated his way across England using a crude version of sat nav based on stone circle markers.

They were able to travel between settlements with pinpoint accuracy thanks to a complex network of hilltop monuments.

These covered much of southern England and Wales and included now famous landmarks such as Stonehenge and The Mount.

New research suggested that they were built on a connecting grid of isosceles triangles that 'point' to the next site.

Many are 100 miles or more away, but GPS co-ordinates show all are accurate to within 100 metres.

This provided a simple way for ancient Britons to navigate successfully from A to B without the need for maps.

According to historian and writer Tom Brooks, the findings showed that Britain's Stone Age ancestors were ''sophisticated engineers'' and far from a barbaric race.

Brooks, from Honiton, Devon, studied all known prehistoric sites as part of his research.

Brooks analysed 1,500 sites stretching from Norfolk to north Wales. These included standing stones, hilltop forts, stone circles and hill camps.

Each was built within eyeshot of the next.

Using GPS co-ordinates, he plotted a course between the monuments and noted their positions to each other.

He found that they all lie on a vast geometric grid made up of isosceles 'triangles'. Each triangle has two sides of the same length and 'point' to the next settlement.

Thus, anyone standing on the site of Stonehenge in Wiltshire could have navigated their way to Lanyon Quoit in Cornwall without a map.

Brooks believes many of the Stone Age sites were created 5,000 years ago by an expanding population recovering from the trauma of the Ice Age.

Lower ground and valleys would have been reduced to bog and marshes, and people would have naturally sought higher ground to settle.

''After the Ice Age, the territory would have been pretty daunting for everyone. There was an expanding population and people were beginning to explore," The Telegraph quoted Brookes as saying.

''They would have sought sanctuary on high ground and these positions would also have given clear vantage points across the land with clear visibility untarnished by pollution.

''The triangle navigation system may have been used for trading routes among the expanding population and also been used by workers to create social paths back to their families while they were working on these new sites," Brookes added.