He was the second son of Ivor Guest, 1st Baron Wimborne and his wife Lady Cornelia Henrietta Maria Spencer-Churchill, an aunt of the future Prime Minister Winston Churchill.

[3] After the end of the war in South Africa he was from June 1902 Aide-de-camp to Brigadier-General Burn-Murdoch, General officer in command of the Standerton District.

[6] At the December 1910 general election, Henry was returned for the Pembroke and Haverfordwest constituency and Freddie was re-elected for East Dorset.

[7] He returned to the House of Commons at the 1922 general election, as National Liberal MP for Bristol North.

[7] Henry did not stand for Parliament again until his brother's death in 1937, when he won the by-election for Freddie's seat of Plymouth Drake as a Conservative.