Gerald Grimstone, Baron Grimstone of Boscobel. Gerry Grimstone is a British businessman. He was previously chairman of Barclays Bank plc and of Standard Life and group deputy chairman of Barclays plc, the holding company for the Barclays Group. On 18 March 2020, he became an unpaid minister at the Department for International Trade and the Department for Business, Energy and Industrial Strategy, and it was announced he would become a life peer.