The house was sold in 1840 to Edward Francis Colston, formerly of Filkin's Hall in Oxfordshire. Colston ordered alterations in 1841–2 including the construction of fencing around the estate, which caused local resentment, a new deer park and two driveways with gatehouses: one towards London Road and one towards the centre of Devizes, bringing about the street name 'New Park Street' (which still exists today). Church services for the villagers of
Roundway were held in the house between 1937 and 1944. The estate, now known as Roundway Park, continued in the Colston family until circa 1948; owners included
Charles, 1st Baron Roundway (1854–1925) and
Edward, 2nd Baron (1880–1944). Further renovations were made during the Colston's ownership including moving the main entrance to the courtyard, the addition of a porte-cochere and a semi-circular balustrade, refurbishing the greenhouse into a library, transforming the sash windows into
mullion windows and the addition of bedrooms and bathrooms. The 2nd Baron's wife Gladys, Lady Roundway continued to live at Roundway Park until 1949 before moving to London, at which point the estate was divided up and sold. ==Fate==