Posted 23 June 2012 - 05:59 AM
Farndale does not list any Ayrshire RHA battery as remaining in UK throughout the war.
He lists, under RHA, 1/Ayrshire and 2/Ayrshire (the former with 13-pr, the latter 15-pr) as being in 52 Div at the end of the war. 13-pr is entirely consistent with RHA and inconsistent with RFA. That said he has them both in 260 Bde.
I think you'll find the Ayrshire bty at Cape Helles (ie Gallipoli) was a mountain bty RGA in 4 (Highland) Mtn Bde RGA. The bty initially joined 29 Div but subsequently reverted to GHQ troops. Its not clear what happened post Gallipoli, 4 Mtn Bde went to Macedonia, but the Ayrshire bty doesn't seem to have been with them (Farndale has Argyll).
For most of the war it's fairly clear from Farndale that the Ayrshire bty was part of 18 Bde RHA, which was the divisional artillery of the Aust & NZ Mounted Division, CRA B-G WD Nichol, who I assume was a RHA officer. They were, of course, under command this division (via the CRA).
I often see the word 'attached' in posts on this site. I assume this reflects mental confusion because in WW1 command relationships were simple, there was only 'command', although the CBSO did have 'executive control' , which seems to have been seen by some officers as a poor idea that confused the neatness of a chain of command.