I was an 'A' tradesman.
I initially trained as a Data Telegraphist, B trade.
I then did the radio side and thus gained my A trade.
I also did the Tele Mech course but didn't qualify for a T trade and prefered to be a A3 RTG as it had more kudos than being a 'failed' tech.
87 Sqdn/38 Sigs Regt were not that keen on us wearing trade badges.
However, my mate Pete was RAMC and the 'Doc' told him to wear his trade badges as he came under RAMC not R Sigs.
There was a badge for Para reading and writing but, apparently it was never achieved...