I will update if any more news or info come to my attention.
From my understanding, it would appear that, although the ICNERP exposure guidelines are applicable to all radio spectrum users, the Ofcom "General Notice of Final Decision" document (18th May 2021) is applicable only to licenced radio users and, at this time, not applicable to CB as a licence-exempt service (this is detailed in A1.32 on page 15). According to this, it means that CB users don't have to carry out an EMF assessment at this present time although Ofcom state they may include an EMF-related condition in licence exemption
regulations in the future.
Link to May 18th 2021 "Final Decision Notice" from Ofcom:
For other EMF-related info and docs, go to https://www.ofcom.org.uk and search for "EMF"
RSGB EMF pages: