The RID the CAA are talking about is the variety used to monitor the use (and abuse) of commercially available drones... position: telemetry, UUID, etc... as clearly stated in a number of their previous official publications where they stipulate...
Just as a matter of interest (re: "Article 16" exemption) What have you been told this applies to? The same with the "FPV exemption" paragraph: both part of the original BMFA document.
With the "...flying above 400'..." exemption: this applies...
Welcome to long-term membership of the same club. After being stupid enough to 'upgrade' from 0670 aircraft firmware to 0772 version: 2.4gHz frequency useless.
Anti Rollback scuppered my chances of resetting to last good configuration and also...
... OR... You can download older archived copies of DJI GO4 from Apkmirror. They are all the legit DJI versions that haven't been pissed about with.
Also: a word of advice concerning Play Store... if you have difficulty running certain (Chinese)...