Good morning,   
Can anyone understand the notations under "Postings" on the Ration Book Application form 1939.  I have a copy from PRONI which lists 5 family members including my Grandfather.  He was a marine engineer, recently returned from working in USA and was particularly difficult to pin down and I wonder if any of the notations against his name may give me some clues -- apart from natural curiousity.  For example :
GB/M 6/9/46(the last will be a date)
BTA    6/9/46
UCH   5/10/46
SLD    11/11/46
UCH   27/2/47
Others of interest are - 
L(UCH)   
G.B.R.  Sept 40   
N.R.110
NHA
NXH   (or possibly WXN)
If anyone has any ideas, I'd be delighted to hear from them........Many thanks,
Halfkiwi