ww1 promotion

[graham saunders]

my grandfather william henry newell joined the royal berkshire reg.t.a.as a private in 1908 in maidenhead  his war medals are inscribed csm at the time of demob. although the rate of attrition was high that is a big leap in rank. is there anywhere where one could tracae the how a nd where the promotion was ?      thankyou graham                                                                                                                                                                 

[JJen]

Hi Graham.

Did William marry a Sarah Blumfield?

If so his Service record is available on Anc***ry.
Regimental Nos - 567/4157

JJ

[ShaunJ]

Was his number 202404, previously 567? He was a Sergeant according to his army file and the medal rolls.

This image has his promotion dates:

FindMyPast:  https://search.findmypast.co.uk/record?id=gbm%2fwo363-4%2f007276317%2f00751&parentid=gbm%2fwo363-4%2f7276317%2f63%2f732

Ancestry: https://www.ancestry.co.uk/interactive/1114/miuk1914a_085884-00750/1008034?backurl=&ssrc=&backlabel=Return#?imageId=miuk1914a_085884-00752