He had half-siblings from his father's first marriage to Eleanor Maud Philips, including Blount's half-brother, Captain Greville Blount, RHA (1883–1914), who died in France during the first year of the First World War,[1] who is a great-grandfather of singer James Blunt.

He joined the nascent Royal Air Force, but died in an aircraft crash near Beverley in July 1918.

The 1910 Eton v Harrow cricket match became known as Fowler's match, after the captain of Eton College, Robert St Leger Fowler, whose outstanding all-round batting and bowling performance allowed Eton to win the match by 9 runs despite being asked to follow on early on the second day, 165 runs in arrears after the teams' first innings.

The teams included one schoolboy who would become a field-marshal (Harold Alexander), another an air vice-marshal (Blount), and a third an attorney-general (Walter Monckton), together with various sons of nobility.

Blount attended RMC Sandhurst immediately after leaving school, and became a Second Lieutenant in the Queen's (Royal West Surrey) Regiment in September 1913.

34 Squadron, flying the Royal Aircraft Factory B.E.2 on the Western Front, in November 1916, became the squadron's acting commander in May 1917, and was confirmed as its commanding officer the following month, flying the Royal Aircraft Factory R.E.8.

He was appointed as commander of the Artillery and Infantry Co-operation School in May 1918, and was promoted to Acting Lieutenant Colonel on 1 May 1919.

2 (Bombing) Group and then succeeding Stanley Goble as air officer commanding (AOC), No.

In May 1940, after the Battle of France, Blount returned to England and resumed his post as AOC, No.

Blount was killed in an air accident in October 1940, when a scheduled flight from Hendon Aerodrome to Belfast – where he was due to meet GOC, Northern Ireland – crashed near the airfield shortly after taking off, three days before his 47th birthday.

He was buried in the south-west corner of the churchyard at St Mary the Virgin's Church, Essendon.