...in 1305, Margaret was instrumental in reconciling Edward I with his wayward son, whose dubious choice of friends enraged the King. It is fair to say that she managed to spare many of the Prince’s friends from the worst of her husband’s wrath.

However, this was to turn sour after the death of Longshanks: Margaret was furious when the new king elevated his favourite, Piers Gaveston to Earl of Cornwall, taking the title that had been meant for one of Mary’s own sons. As much as her husband before her, Margaret despised Gaveston’s influence over her step-son and eventually provided funds to the English barons who brought about his exile.

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