alison davis

Hi, I am new to this site and I was wondering if somebody is able to identify a badge? The badge in question is on the arm of the L'Cpl in the centre of the pic and is the middle 'V' shaped one. In post 195, page 10 of this blog it is identified as a badge officers and other ranks wear. I was really just wondering what the purpose of the badge was considering the solders already had their ranks on their arms anyway? Many thanks to anyone that can help!