the descendants of Edmund the Ironside

Hello,

I am not sure if this is the right sub for my question. I have this weird hobby of playing with counterfactual history and looking up the alternative lines of succession to various thrones (I have no idea why, as I am a small r republican). My latest find is that a man called Peter Kenneth Poland (born 1945, no idea if he's still alive) would be the "rightful heir" to the English throne as a descendant of Edmund the Ironside. Could someone check this line of descent to see if I have it right? I have used the traditional pre-2015 rule, i.e. male-preference primogeniture. I may have skipped a few people who died without an issue along the way. I used Wikipedia and thepeerage.com

• Edmund the Ironside
  Edward the Exile
  Saint Margaret of Scotland
  David I
  Henry of Scotland
  Margaret of Huntingdon Countess of Brittany
  Henry de Bohun 1st earl of Hereford
  2nd earl of Hereford
  3rd earl of Hereford
  4th earl of Hereford
  7th earl of Hereford
  Eleanor de Bohun
  Anne of Gloucester
  Humphrey Stafford 1st Duke of Buckingham
  Henry Stafford
  Henry Stafford 2nd Duke of Buckingham
  3rd Duke of Buckingham
  Henry Stafford 1st Baron Stafford
  3rd Baron Stafford
  4th Baron Stafford
  Edward Stafford
  Mary Stafford
  John Stafford Howard
  Mary Stafford Howard
  Marie Françoise Plowden
  Sir William Jerningham
  George William Stafford Jerningham, 8th Baron Stafford
  Hon. Edward Stafford-Jerningham
  Emily Charlotte Stafford-Jerningham
  Beatrice Mary Teresa Fitzherbert
  Hester Mary Beatrice Chichele-Plowden
  Trevor Peter Gordon Poland
  Peter Kenneth Poland