Question: Captain Douglas Ricardo "Doug" Beattie MC is an Irish soldier and politician, "Born in barracks"" in 1965, his father was a warrant officer in which infantry rifle regiment of the British Army, first created in 1881 by the amalgamation of the 83rd (County of Dublin) Regiment of Foot and the 86th (Royal County Down) Regiment of Foot, but became which organization on 1 January 1921?
Sentence (from "East Lancashire Regiment"): The regiment was formed in 1881 under the Childers Reforms by the amalgamation of the 30th (Cambridgeshire) Regiment of Foot and 59th (2nd Nottinghamshire) Regiment of Foot with the militia and rifle volunteer units of eastern Lancashire.
Relevant evidence: No