Full name, birth date and location and death date and location from the Congreve Family Tree at ancestry by anyacongreve.
In the January to March 1913 birth index
Douglas N. W. Holman, mother’s maiden name Wragg, Sheffield, Yorkshire, volume 9c, page 1131.
UK Commonwealth War Graves
Memorial Register, Chatham Part 4.
Able Seaman
Douglas Noel Wragg Holman, C/SSX. 15819. Royal Navy H.M.S. Mendip. 24th October 1940. 35,3.
UK British Army and Navy Birth, Marriage and Death Records
Douglas Noel Wragg Holman, C/SSX.15819, Royal Navy, rank A.B., HMS Mendip, born December 24 1912 Sheffield Yorkshire, died October 24 1940, cause of death - missing - death on war service presumed , place of death Scapa Flow,m Orkneys
Findagrave
Able Seaman
Douglas Noel Wragg Holman Veteran
Birth unknown
Death 24 Oct 1940
Monument
Chatham Naval MemorialChatham, Medway Unitary Authority, Kent, England
Plot 35 3.
Memorial ID 14373391
Service No: C/SSX 15819
Regiment/Service: Royal Navy, H.M.S. Mendip
The HMS Mendip had completed construction on October 16 1940. She sustained damages when one of her depth charges exploded during work up exercises, this lead to the death of Douglas Holman and others.
From
https://www.wildfire3.com/mendip.htmlHMS Mendip (L60)
24 Oct 1940. HMS Holderness, while on work-up exercises, and undertaking depth-charge practise, one of the depth charges dropped from her stern blew up prematurely. She sustained serious damage to her stern structure and five of her crew were missing presumed killed.
Holman, Douglas N W, Able Seaman, C/SSX 15819, MPK
Holman, Stanley, Able Seaman, C/SSX 15731, MPK
Hutchins, William P, Able Seaman, C/JX 98898, MPK
Norman, John B P, Ordinary Seaman, C/JX 199312, MPK
Seabrook, Henry C, Petty Officer Steward, C/L 13329, MPK
[I wonder if the 2 Holmans were related?]
See Wikipedia:
https://en.wikipedia.org/wiki/HMS_Mendip_(L60)