RootsChat.Com

Eric Lewis Conran died while undergoing an operation for a supposed cerebral tumour on 6 January 1924, while still a serving officer in the RAF.

https://www.rafmuseumstoryvault.org.uk/archive/conran-e.l.-eric-lewis
https://www.rafmuseumstoryvault.org.uk/archive/7000240475-conran-e.l.-eric-lewis

He also has two earlier casualty incident cards, the first of which states that he was wounded on 26 March 1915, apparently while attached to the RFC as a member of the 2 County of London Yeomanry, although the second card with the same date says he was serving with the Lancers and dismissed from the service. Given that both cards have the same date, the two are presumably related to the same incident which resulted in him being courtmartialed.

https://www.rafmuseumstoryvault.org.uk/archive/conran-e.l
https://www.rafmuseumstoryvault.org.uk/archive/7000240474-conran-e.l

He also has an associated casualty form that gives a potted history of his career up to the point at which he was courtmartialled. Note that the link below has a link to a second page at the foot of the casualty form shown. Although the casualty cards above suggest his courtmartial was a result of his wounding on 26 March 1915, the form below shows he wasn't courtmartialled and dismissed from the service until September 1916.

https://www.casualtyforms.org/form/3903

You can find out more about the role of the Royal Artillery on this page at the Long Long Trail, but the branch that Frederick was in, the Royal Garrison Artillery, were responsible for the large calibre guns and howitzers that were positioned someway behind the lines and used to lay down artillery barrages in advance of major attacks and the like. Although the movement of these guns became increasingly mechanized as the war progressed, there would have still been a need for large teams of horses to move the guns when required.

http://www.longlongtrail.co.uk/army/regiments-and-corps/the-royal-artillery-in-the-first-world-war/

A key part of the war was also these batteries seeking out the other sides' batteries and shelling them to destruction, so I could easily see a scenario where his battery was shelled, with both human and animal casualties.

A search of the British Newspaper Archive produces this fragment from the Staffordshire Advertiser of 14 October 1916, which suggests that he was in the Royal Garrison Artillery at the time of his marriage, OCR issues aside. Obtaining a copy of his 1916 marriage registration would be quite useful at this point I think.

The wedding of pte. Parrott, Royal Garrison Artillery, fourth son of the lat Mr. Frank Parrott, of Seig) ford Grange and ford Hall, Seighford, snd Miss Deis, Mary Tie ...

There are medal index cards for at least two Frederick Parrott's serving with the Royal Garrison Artillery, one with service numbers 850 and 292554, the other with service number 74913.

I think you'll find that the appearance of the mother's maiden name in an online birth index in either Scotland or England is related to the 100-year rule if you are looking at the indexes on either ScotlandsPeople or the GRO. The only exception within the period covered by the 100-year rule that I have noted is that if you know the mother's actual maiden name and enter it as part of the search criteria, it will show the mother's maiden name in the search results if the birth is a post-1923 birth. This is certainly the case for my own children who were born in England in the late 1990's/early 2000's. I can find their birth registrations using my own surname, but without mother's maiden name mentioned in the search results, but if I specify their mother's maiden name as part of the search criteria, it does show their mother's maiden name in the search results.

ScotlandsPeople has over the last few years slowly been adding mother's maiden name to all their indexed births from 1855 onward, up to 1923. They are also adding them to the indexed deaths as well, although there is still a gap from the late 1920's up to 1974 when they started being routinely indexed.