Charles Alexander Holcombe Longcroft was born on 13 May 1883 in
Cardiganshire,
Wales, the third of four children born to Charles Edward Longcroft (1842–1892) and his wife, Catherine Alicia Holcombe. The Longcrofts had originated in
Wiltshire but first rose to prominence as merchants in
Hampshire in the 18th century. Charles' somewhat distinguished great-grandfather, Captain Edward Longcroft
RN (c.1750–1812), had settled in Wales in the mid-1780s after returning from a lengthy period of service in the West Indies during the American War of Independence. Charles' father inherited the Llanina estate in 1888 but after his death only four years later the estate passed in trust to his nine-year-old son. Charles Longcroft was educated at
Charterhouse, attended the
Royal Military College, Sandhurst, before May 1903 and was then commissioned into the
Welch Regiment. After obtaining his
Royal Aero Club certificate in March 1912, Longcroft was attached to the
Air Battalion of the
Royal Engineers at his request. With the establishment of the
Royal Flying Corps in the following month, he was seconded to the new Corps. ==First World War==