 However, given the increasing threat from English power, it seems that Strathclyde/Cumbria switched sides and joined with the Dublin Norse to fight the English king who was now in control of Danish Northumbria and presenting a threat to the flank of Cumbrian territory.After the Battle of Brunanburh in 937, (an English victory over the combined Scots, Strathclyders and Hiberno-Norse), Athelstan came to an accommodation with the Scots.During this time, Scandinavian settlement may have been encouraged by the Strathclyde overlords in those areas of Cumbria not already taken by the Anglo-Celtic aristocracy and people.