 A 1962 policy statement committed BDP to “the principle of equal status for all professions”.The firm expanded rapidly over the following decades and had 30 partners and 700 staff by the time of Grenfell-Baines’s retirement in 1974.The firm has been associated with a variety of large public and private projects, such as the controversial Preston bus station that was designed by BDP's Keith Ingham and Charles Wilson, and retail projects such as the Liverpool One complex.