1929 Lyon had increased his landholding within the Sudbourne estate to 510 acres, comprising the Hall and 314 acres and 196 acres of the park and four cottages, including Rustic Lodge and White Lodge. In 1935 he was declared bankrupt, and was stated in the announcement in the London Gazette to be a company director, residing at "Tatchbury Manor House, Woodlands, near Southampton, Hampshire, lately residing at Sudbourne Hall, Orford, Suffolk". Greenwell Sudbourne Hall and the remainder of the estate (including the whole of Iken) was purchased in the 1930s by Sir Bernard Eyre Greenwell, 2nd Baronet (1874-1939), senior partner in his family's prominent stock-broking firm W. Greenwell & Co., of the City of London, founded by his father Sir Walpole Lloyd Greenwell, 1st Baronet (1847-1919), "of Marden Park in Godstone in the County of Surrey and Greenwell in Wolsingham in the County of Durham", who was a keen agriculturist and noted breeder of pedigree stock, particularly Shorthorn cattle and Shire horses. Further adjoining estates were purchased by the 2nd Baronet, including Gedgrave Hall, near Woodbridge, and the freehold of Butley Abbey, which however he allowed to remain the lifelong residence of the seller, Dr Montague Rendall (1862–1950), the former headmaster of Winchester College, who having purchased it in 1926 had "spent his last penny" in restoring the mediaeval gatehouse "with imagination and scholarly care". The 2nd Baronet resided at Butley Abbey Farm and at Marden Park and died in 1939. His heir was his son Sir Peter McClintock Greenwell, 3rd Baronet (1914–1978), who served as High Sheriff of Suffolk in 1966–67 and who in 1969 resided at Butley Abbey Farm. During World War II the 3rd Baronet served in the army and in 1940 was captured at the Battle of Dunkirk when he became a prisoner-of-war, during which time the Sudbourne estate was run by an agent. In 1942 twelve square miles of the vicinity, comprising almost all the land to the north of Orford as far as the River Alde including the villages of Orford and Iken, and covering much of the former Sudbourne estate, were requisitioned by the War Department as the "Orford Battle Training Area" and was compulsorily evacuated for use in tank training exercises. The headquarters and officers' mess was at Sudbourne Hall, with other ranks living in tents in the park. One of the first units to be stationed there was a battalion of