He was invested as a Companion, Order of St. Michael and St. George (C.M.G.) in 1917. He served in the First World War and he was Controller of Gun Ammunition, Ministry of Munitions and Director of Ministry of Supply during the Second World War.
Married Margaret Christine Whitehouse in November 21, 1942.
"Ireland Civil Registration Indexes, 1845-1958," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FB3C-Z2X : 4 December 2014), BIRTHS entry for Lionel Charles Patrick Milman; citing Clonmel, 1877, vol. 9, p. 659, General Registry, Custom House, Dublin; FHL microfilm 101,054.
"England and Wales Death Registration Index 1837-2007," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVCK-1TWL : 4 September 2014), Lionel C P Milman, 1962; from "England & Wales Deaths, 1837-2006," database, findmypast (http://www.findmypast.com : 2012); citing Death, Surrey North Eastern, Surrey, England, General Register Office, Southport, England.