2. According to Allocations of Siege Batteries, R. G. A. the Siege Batteries listed under 23rd Heavy Artillery Group in your posting were allocated as follows on 1 July 1916:
44th Siege Battery: XV Corps Heavy Artillery unallocated
125th Siege Battery: 35th HAG
4. Southern Heavy Group was composed of units from 25th HAG.
7. Northern Counter Battery Group was composed of units from 9th HAG.
9. Southern Counter Battery Group was composed of units from 2nd HAG.
Thanks for this. The odd comment (beyond saying thanks a lot for the information)
44th Siege Battery WD makes no mention of their affiliation. I plan to look at XV Corps GOCRA and GOC HA files on Thursday which may help. I am guessing that 14 HAG looks a likely bet.
35 HAG (re: 125 th Heavy [not Siege] Battery) was part of VII Corps HA and I have the complete list of units for this and 125th Heavy Bty was not part of it in June/July. This was a heavy howitzer group then. There is no 125th Heavy Battery WD.
AFAIK there is no WD for either 25th or 2nd HAG either at all or for this period but there is one for 9th which I will try to see Thursday.
I still have GOCRA/GOCHA X and XV Corps to see (Thursday again!) which may clear up some of these points but thanks for the help. Very much appreciated.
I have a fair few other gaps for COs for batteries. I may yet come back to you.