[1] In 1927 he sold the Manton estate and racehorse training establishment near Marlborough, Wiltshire, which had been purchased by his father.
However unfortunately (with much general disapproval (see reports in The Times newspaper)) before the sale he removed the mediaeval stained glass (with heraldry of the Verney family) from the chapel, which he sold in 1931 in four lots at Christie's.
having sold his father's briefly-owned seat of Compton Verney, in 1938 he purchased Plumpton Place near Lewes in Sussex, where he established a racehorse stud.
[9] With his brother Robert he was a director of Newmarket Bloodstock Ltd.[2][9] He married twice: Manton died in June 1968 at his home Plumpton Place.
[15] On his death, the title passed to his son and only child by his first wife Alethea Langdale, Rupert Watson, 3rd Baron Manton.