He became known by the courtesy title Viscount Folkestone when his father succeeded in the earldom of Radnor in 1869.

[2] When the Conservatives came to power in 1885 under Lord Salisbury, Folkestone was sworn of the Privy Council[3] and appointed Treasurer of the Household.

[4] The South Wiltshire constituency was abolished in 1885[2] and at the general election of that year, Folkestone was instead returned for Enfield.

They had four children: Lord Radnor died in June 1900, aged 58, and was succeeded in the earldom by his eldest son, Jacob.

[12] Sir Hubert Parry wrote his famous Lady Radnor's Suite for her in 1894.