There were many thousands of RRC/ARRC awards during the war, and there were never citations for them. They were decided purely on personal recommendation - i.e. a couple of times each year the Principal Matron in each theatre of war would invite her matrons to submit names of women who had worked well, probably above expectations, over a longish period; these recommendations would then be submitted to the Director of Medical Services for approval, and forwarding to the War Office. There was a strict limit on the number of awards given, so often the lists would be returned for pruning, or at worst, the War Office would just chop a few off themselves. But usually each area knew how many they were allowed of each class and submitted accordingly. So they were not usually awarded for a single occurrence of good work, unless it went along with general 'beyond the call of duty.' I'm often surprised at the fact that some women seemed to have glowing reports throughout their time, and never received an award of any sort, and perhaps in a few cases it was a matter of a face fitting in with what a matron required (or not!).
I've got a digital copy of the RRC Register here, and to give some idea of numbers, your grandmother's award was number 11798. Only about 250 awards were made prior to the Great War, so all those thousands were wartime awards. The date of the London Gazette in which the ARRC was announced was 3rd June 1919, and the page says 'Decorated at Dublin, 4/8/20.' If you would like a copy of the page, let me know, although you won't be able to use the PM or email system until you have five posts, but there's a contact email on my website link below.
Regards --- Sue
Thank you Sue
I can't believe the speed of that response. Well that figure of > 11,000 awards certainly puts it all in perspective- and makes sense. I have a copy of the Gazette page for 1919 but not for the date in 1920 and thank you for your offer. I am still fascinated by the accounts ofthose who worked here and the freedom it must have given on one level amid all the chaos and suffering. So any pointers are most welcome.