That's about the way I see it as well. But why bother logging 'Instrument Flight' time which isn't your own - what purpose would it serve?
I understand that it's only flights under JAR/OPS rather than flights flown by those licensed under JAR/FCL which have to log this ludicrous 'Flight under IFR' time - so normal non-Public Transport SEP work does not require 'Flight under IFR' to be logged - only 'IF' time?
The CAA's attempt to help with its GID has exposed what utterly bizarre decisions have been made regarding who/what logs what/when on each occasion! For once the UK military system (apart from the weird Coastal Command idea of navigators, AEOs and probably stewardesses being aircraft commanders..) is actually easier and simpler to understand.....