However , on the death of King Henry I in 1135 , the area was regained by Scotland 's King David I. He was able to consolidate his power and made Carlisle one of his chief seats of government .
England descended into a lengthy civil war .
However , on the death of King Henry I in 1135 , the area was regained by Scotland 's King David I. He was able to consolidate his power and made Carlisle one of his chief seats of government , while England descended into a lengthy civil war .