My understanding is the same as yours, Level Attitude
Don't think it is.
The CAA have always been clear that for a flight to be an "Instructional Flight"
(ie One person logging PIC and teaching a second person who logs PUT) then
the Instructor must have instructional privileges for all aspects of the flight.
Hence their IN several years ago reminding FIs that they were not permitted
to "demonstrate" any aerobatic manoevre during a lesson/trial lesson unless
they also held aerobatic instructional privileges.
CRIs cannot exercise their privileges at night as they will not have
"
demonstrated the ability to instruct at night to an FI qualified in accordance
with (i) below"
and EASA have not put in place a process whereby they can.
Instructing at night will not have been taught to a CRI and their competence
to so do never tested.
So why does anyone believe they have this privilege?