This jars with the popular narrative of Scottish history, that tells of:
- against-the-odds plucky resistance to Roman and English domination;
- a political union with England arranged through bribery of the nobility;
- the forced emigrations of the Highland Clearances;
- famous losers like Mary Queen of Scots or Bonnie Prince Charlie;
- Scotland itself disappearing into a twilight of Celtic mysticism, leaving behind tight-fisted alcoholics with massive chips on their shoulders against the English and their avatars (Maggie Thatcher, milk snatcher!)
Area of Northern England under Scottish control, 1138-1157:

A nation anciently reviled across England, Poland, the Holy Roman Empire and France as poor yet infuriatingly self-entitled: her people haughty, saucy, grasping, dirty and disputatious... though useful mercenaries in Europe's endless rounds of war.
A country that enthusiastically participated in the British Empire, whose entrepreneurs ran slave plantations in the Caribbean and fought the Qing Emperor over the right to sell opium to the Chinese people; entrepreneurs whose extortion of debt from impecunious American colonists was one of the contributing factors to the American War of Independence.
Ruins of the Chinese Emperor's Old Summer Palace, looted & burned by British forces in 1860:
A people whose Hibernophobia and anti-Catholic prejudices long predate the Union, the roots of which prejudice have never properly been tackled. A people whose once stolid unionism has recently fractured into Scottish and British nationalism, waking who knows what sleeping monsters.
Personally I find that a much more interesting story than the standard narrative. Celtic twilight? Meet Bastard dawn.