There was originally no information about this man in the EJBA.
[PB: Is JA the brother of 1345 William Allerton, 17th Lancers? Notice John Allerton joined the regiment 29.9.55 with Cornet Marshall, at the same time as William. Notes [RM?] add "Ex-16th Lancers 31.8.55. To 2DG 31.12.56."]
Check also Crider 3rd edition p.424.