In the
1932 New Year Honours, he was appointed to the
Order of the Bath as a Companion (CB). On 31 July 1937 Campion was promoted to be the
Under Clerk of the Parliaments. He was the editor of the 14th and 15th editions of
Erskine May: Parliamentary Practice. Campion was appointed a Knight Commander of the Order of the Bath in the
1938 New Year Honours (KCB). He was appointed to be a Knight Grand Cross (GCB) in the
1948 Birthday Honours and retired that year as Under Clerk of the Parliaments, when he was replaced by
Frederic Metcalfe . In the
1950 Birthday Honours, his barony for "public services" was announced and he was raised to the peerage as
Baron Campion, of Bowes in the County of Surrey. ==Family==