Samuel Alfred Miles born London 21st June 1907...service number 1073153 a bricklayer's labourer, enlisted in Nottingham into the Royal Artillery on the 29th August 1927.
He enlisted for a period of 12 years service, which was to be served as 6 years with the colours, i.e. as a full time soldier, after which he had the option to either continue serving with the colours for another 6 years, or, to become a civilian but with a reservist liability to be recalled to serve with the colours in the event of a war or a national emergency.
On 14th December 1933 after about 6 years and 4 months service, he was transferred to the Army Reserve, i.e. he became a civilian, which was probably as a result of his illness.
So it appears that before he became ill, he had chosen to continue to serve with the colours for the balance of his 12 year enlistment period.
His rank isn't stated, but he was probably a Gunner, which is the Royal Artillery term for a Private.
On 28th August 1939 i.e. at the end of his 12 year enlistment period, he was discharged under
Para 510 ( vii ) KR ( CDTAA ).
That is Paragraph 310 of The Kings Regulations Army and the Army Reserve 1935, which would have been amended in future years, so his discharge would have been made under the provisions of the 1939 edition, which were probably exactly the same as in the 1935 edition.
Para 310 deals with the various reasons for which a person could be dischared from the Army or the Army Reserve.
Sub paragraph ( vii ) of paragraph 310 = " termination of first period of engagement "
The reason for the use of the term, " first period", is because after his first term of enlistment had been completed, and depending on his age at that time, a soldier had the option to reenlist for a second period of service, during which he might serve up to the maximum permitted age.
I'm not sure what CDTAA is, but it might be Coastal Defence Territorial Army Artillery or Anti Aircraft.
He was only 32 when he was discharged in August 1939 and on 2nd September 1939 males in the U.K. between the ages 18 and 41 who weren't otherwise exempt, became subject to military conscription, the following day Britain declared war.
Unless you know otherwise, it might be, that initially at least, and depending on the state of his health during WW2, that he might have served at home in the Territorial Army, although of course if his health had deteriorated and he couldn't continue to serve in the T.A. he might have subsequently enlisted into the Home Guard.
As far as I'm aware, nobody was transferred into the Home Guard, people who served in it enlisted voluntarily.
You can get a copy of his Army service record from the UK Ministry of Defence MOD for £30 and you will need to supply a copy of his death certificate.
https://www.gov.uk/requests-for-personal-data-and-service-re...If you haven't already got a copy of his death certificate you can get a copy from here,. for about £10.
http://www.derby.gov.uk/community-and-living/marriages/regis...Home Guard records didn't all survive, but any that have survived can also be obtained from the MOD and the application fee for those also costs £30, even if they don't exist.
If I were you I wouldn't apply for a Home Guard record until you have first seen his Army record.
Army records can be quite difficult to understand, but if you post a copy of it on here as a jpg format picture message attachment somebody will probably give you some help with deciphering it.
This is the Royal Artillery Museum, they won't have personnel records, but they do have records about individual units.
http://firepower.org.uk/