Lots of good stuff here, an not just on aircraft applications !
In some ways it is a little surprising that war time restrictions on reporting technical subjects were lifted so quickly: The Engineer, Engineering, Proceedings of the Institute of Naval Architects etc all have good reviews of wartime activities.
Unfortunately, what Wireless World doesn’t clarify is the physical development of the sets: The No1 Transmitter Set illustrated is the smaller type, barely larger than the external helical coil, similar to the Type 52 set.
Next thought is Sterling Company production records.