Still prefer the old JT, best rank in the RAF. And for what it's worth no JT worth his salt would have listened to a thing a lance jack had to say in disciplinary terms.
That JT is clearly not worth his salt if he deliberately ignored a legal order from an NCO. There is a section in the MML which gives an example charge, and it is extremely simple, along the lines of "LCpl Smith ordered Pte Jones to stand to attention, which Jones failed to do". Substitute AC, LAC, JT, SAC, SAC(T) for Pte and we are good to go.
Many of the Army's LCpls are awarded the rank on completion of a long course, and are on the higher pay band. Often the JTs erroneously thought their pay grade was higher. Perhaps they were comparing their own tech pay to an MT driver's pay. Certainly on the RAF stations I served on (as a LCpl at the time), the Army LCpls were on the old Band 3, but at LCpl level, not Pte, therefore the JTs lost on pay AND rank. Membership of the Cpls' Club was also an issue for them, and compulsory for us.
The whole thing comes back to the RAF counting promotions while the Army counts chevrons. Unfortunately for the RAF, QRs backs up the Army every time.