By the terms of his father's entailment, his English properties reverted to his legitimate cousins upon his death. Streatlam Castle was eventually sold by the family in 1922 on the eve of the wedding of Lady Elizabeth Bowes-Lyon to the Duke of York, allegedly to pay for the costs of the wedding. It passed through many hands, and was demolished by its new owner Philip Ivan Pease in 1959, but the Pease family retains the lands till date. The Gibside estate is now owned by the National Trust.