The William Austen–Renwick (WA-R) Trust, is a charitable organization, in the United Kingdom, founded by Lord Ellis Austen-Renwick. The Trust is in memory of Lord Ellis’ grandfather, the late Captain William Austen-Renwick, a hero of the British Army.

Captain William, born in 1874 to parents, Charles Austen-Renwick and Edwina (nee-Toulson) was born into the British monarchy; cousin of King George V. Captain William studied Politics & International Military Affairs at Eton College, before enlisting into the British Army. He married Elizabeth (nee Lewis) in 1898. Elizabeth gave birth to their only son, Henry in 1903. Elizabeth died young and William never remarried. Henry later married Margaret (nee Stuart) in 1929. Together Henry & Margaret had son, Ellis, born in 1934, and daughters, Victoria (1936) and Charlotte (1937).

Captain William Austen-Renwick pictured on duty in Bambatha in 1906

Captain William served as Captain in the British Army during many conflicts including:

• Benin Expedition (1897)
• The Second Boer War (1899-1902)
• Tibet Expedition (1904)
• Bambatha (1906)
• Easter Rising, Dublin (1916)
• World War I: Arab Revolt (1916-1917)
• Estonian War of Independence (1918-1920)
• Afghan Civil War (1928-1929)
• Great Arab Revolt in Palestine (1936-1939)

He retired gracefully from the British Army, a hero in 1939 after over 40 years of service to King & Queen.

The William Austen-Renwick Trust celebrates the life of British Military conquests. Founded in 1976 by his grandson, Ellis, the Trust run a National Book Club, known as Club Legion which remembers those who have fought and died for Great Britain. The William Austen-Renwick Trust provides mentoring support and offer financial grants to servicemen and women who have helped make Great Britain, the proud Empire that she is.