Archaeologists have been carrying out research into a huge late fist century AD defence system, which stretches 120 miles across Scotland. A total of 14 forts and several fortlets, which formed part of a defensive network built in the AD 70s, have so far been investigated over the past decade by the team, led by Dr Birgitta Hoffmann and Dr David Wolliscroft, both of the University of Liverpool. The network, which is thought to have run from Montrose or Stonehaven, south of Aberdeen, on the North Sea coast to the Firth or Clyde, was built some 50 years before Hadrian's...