Baron Astor of Hever of the ninety elected hereditary peers who remain in the House of Lords after the passing of the "House of Lords Act" of 1999, and he sits on the Conservative benches. As a male-line descendant of the first Viscount Astor, Lord Astor of Hever is also in remainder to this peerage and its subsidiary title Baron Astor, of Hever Castle in the County of Kent. The Hon. John Astor, third son of the first Baron, served as a Conservative Member of Parliament from 1964 to 1974. The heir apparent is the present holder's son, the Hon. Charles Gavin John Astor
Hever Castle is now open to the public as a tourist attraction. There have been three main periods in the construction of this historic castle. The oldest part of the castle dates to 1270 and consisted of the gatehouse and a walled bailey. The second period was when the castle, then in need of repair, was converted into a manor in 1462 by Geoffrey Boleyn, younger brother of Thomas Bolyen, Master of Gonville Hall, Cambridge. He added a Tudor dwelling within the walls. The third period of repair and renovation was in the 20th century, when it was acquired by William Waldorf