Rob, I don't know whether you have access to the FMP website which carried service records for the NF.
https://www.findmypast.co.uk/transcr...SILIERS/047623
The site usefully explains abbreviations used:SGG, St George's Gazette; SWB, Silver War Badge; AVL, Absent Voters List; MIC, Medal Index Card; MR, British War Medal and Victory Medal Roll Books. On the notes it also states that information from the family gives a service number 7/2657.