Who was Britain's oldest Prime Minister and lived in the Seaforth House built for his father?
Seaforth House Seaforth House was a mansion in Seaforth, Merseyside England built in 1813 for Sir John Gladstone, father of William Ewart Gladstone who was Prime Minister of the United Kingdom four times.
Sir John Benn, 1st Baronet Sir John Williams Benn, 1st Baronet, DL (13 November 1850 – 10 April 1922) was a British politician, particularly associated with London politics, and the grandfather of former MP and Cabinet Minister, Tony Benn.