A long-running feud within one of Britain’s most distinguished aristocratic families allegedly began when the Marquess of Hertford urged his son to abandon his bride at the altar, as reported by The Times.
Despite this, William Seymour, Earl of Yarmouth, proceeded with his marriage to Kelsey Wells, a former Goldman Sachs banker, in June 2018. However, he later found himself cut off from inheriting the family’s £85 million estate, a matter now being contested in the High Court.
The Hertford family, descended from Edward Seymour, brother of Henry VIII’s third wife, Jane Seymour, owns Ragley Hall – a grand Palladian mansion in Warwickshire surrounded by a 6,000-acre estate.
It has now emerged that Lady Yarmouth wrote an emotional letter to her father-in-law, Henry, the 9th Marquess of Hertford, on her second wedding anniversary, accusing him of trying to undermine her marriage. “When it was clear and confirmed that William would marry me, there started in earnest the concerted effort to undermine, frustrate, and disrupt our relationship and our happiness,” she wrote.
She also revealed that on their wedding day, Lord Hertford had allegedly told his son, “When you are up there, just tell her no,” and later refused to sit next to him at their wedding breakfast. The situation escalated a year later when the couple was given six days’ notice to vacate their home on the Ragley estate, an experience Lady Yarmouth described as deeply traumatic. Shortly after, she was hospitalized while pregnant, which she blamed on the immense stress caused by the eviction.
The Hertfords justified the move by stating that the property was required for Lady Pamela, Dowager Marchioness of Hertford.
Lady Yarmouth’s letter to her father-in-law questioned the hostility directed toward her: “What on any human level did I ever do to you to warrant such deliberate, sustained, and calculated vicious behaviour?”
Lord Hertford, 66, dismissed the letter, forwarding it to his wife Beatriz with the comment “fyi/amusement”. Lady Hertford, 64, then shared it with their three other children – Lady Gabriella, 32, Lord Edward, 30, and Lady Antonia, 26 – adding: “She is dying for a fight … Radio Silence is best”. A source close to Yarmouth’s family noted: “The content of those emails is far from amusing.”
Earl Yarmouth is now seeking to restructure the family trusts controlling the estate, alleging the trustees have sided with his parents. However, Lord and Lady Hertford, their other children, and the trustees reject the claims, arguing there is no bias.
Lord Hertford told the court that his relationship with his eldest son deteriorated sharply before his marriage, and evidence was presented of “hostile and inflammatory” messages Yarmouth allegedly sent his mother, questioning his father’s mental capacity.
Lord and Lady Hertford have declined to comment. Judgment in the High Court case remains reserved.

















