Logging IFR hours - is my thinking correct?

[S-Works]

I have heard dozens of drop aircraft cleared into the LTMA, and never once heard the words special VFR spoken.

Tell me what terminology was used?

This is all wrapped up in the exemption for parachute dropping in CAS, the exemption in the UK also allows IMCR holders to operate within CAS that is normally excluded to them, i.e Class A.