Archaeologists are carrying out a virtual excavation of Stonehenge to discover what the area looked like when the monument was built.

The multi-million pound Euro study will map the terrain and its buried archaeological remains with pinpoint accuracy, organisers claim.

The millions of measurements will then be analysed and incorporated into gaming technology to produce 2D and 3D images.

The research will take three years.

Equipment will be spread over an area spanning 4km this year and a total of 14km over the next three years....