Simon McCoy on BBC News at One said it was "the last engagement before the birth of her second son".
Was that a slip of the tongue or does he know something we don't?
If that were the case, then surely there is no real effect on the succession because Richard, Earl of Cambridge, married Anne Mortimer who was great granddaughter of Lionel of Antwerp and thus from the senior line of Edward III, therefore the Yorkist claim would remain intact?