34997 is a refernce to the piece number for the 1911 Census
MITCHELL, WILLIAM GEORGE BROWN
GRO Reference: 1888 S Quarter in MELKSHAM Volume 05A Page 107
did try looking for a Robert Noble who was on the same page as W G on the 1911 Census and he appears to have served as a driver in the 43 Brigade, Royal Field Artillery from 1914 onwards.
Some information on William George Mitchell, Service Number 47999, a Driver in the Royal Field Artillery who was demobilised in October 1919. Question is whether your W G had a connection to Bristol? A William George married to an Ivy L Lewis in 1927 and again to Mary L Lewis in 1929, both in Melksham RD. Another William George married to Maude M Miller in Bristol in 1920.
The second page of the newspaper states that the town shown is that of the soldier's next-of-kin (unless stated to be his place of enlistment).
Weekly Casualty List (War Office & Air Ministry ) 06 November 1917
(No. 5042.)
WAR OFFICE WEEKLY CASUALTY LIST, NOVEMBER 6th, 1917
Daily List of October 29th (contd.).
PART VIII. W.Os N.C.Os AND MEN (contd.)
WOUNDED.
ROYAL FIELD ARTILLERY.
Mitchell 47999 W G Dvr (Bristol)
https://search.findmypast.co.uk/bna/viewarticle?id=bl%2f0001952%2f19171106%2f021&stringtohighlight=mitchell%2047999William G Mitchell in the British Army WWI Medal Rolls Index Cards, 1914-1920
British Army WWI Medal Rolls Index Cards, 1914-1920
Name: William G Mitchell
Regiment or Corps: Royal Field Artillery
Regimental Number: 47999
https://search.ancestry.com/cgi-bin/sse.dll?h=4659306&dbid=1262&indiv=1William George Mitchell in the UK, WWI Service Medal and Award Rolls, 1914-1920
Name: William George Mitchell
Military Year: 1914-1920
Rank: Driver
Unit: Royal Field Artillery
Company: WO 329
Regiment or Corps: Royal Field Artillery
Regiment Number: 47999
Medal Awarded: British War Medal and Victory Medal
https://search.ancestry.com/cgi-bin/sse.dll?h=4352995&dbid=5119&indiv=1W G Mitchell in the UK, WWI Service Medal and Award Rolls, 1914-1920
View UK, WWI Service Medal and Award Rolls, 1914-1920
Name: W G Mitchell
Military Year: 1914
Rank: Driver
Unit: 40th Brigade Royal Field Artillery
Company: WO 329
Regiment or Corps: Royal Field Artillery
Regiment Number: 4799 9
Medal Awarded: 1914 Star
https://search.ancestry.com/cgi-bin/sse.dll?indiv=1&db=IWOServiceMedalAwardRolls&h=5177845WO 363 - First World War Service Records 'Burnt Documents
Originating Record WO 363. 13/62823 Arthur George Chapman, King's Royal Rifle Corps
https://www.findmypast.co.uk/transcript?id=GBM%2FWO363-4%2FSUPP%2F65044Soldier Number: 47999, Rank: Driver, Corps: Royal Field Artillery
WO372/14
Campaign Medal Index Cards and Silver War Badge Cards
https://www.findmypast.co.uk/transcript?id=GBM%2FMCI%2F3075952Reference: WO 372/14/40921
Description:
Medal card of Mitchell, William G
Corps Regiment No Rank
Royal Field Artillery 47999 Driver
Date: 1914-1920
Held by: The National Archives, Kew
Legal status: Public Record(s)
Closure status: Open Document, Open Description
https://discovery.nationalarchives.gov.uk/details/r/D4087260