Am I correct in saying that in the past it was possible to complete the IRI course if you had an FI and an IR?
Pre-EASA there was also an Experience requirement. Which was also 200 hours IFR (if I remember correctly)
However the UK CAA allowed 1 hour of IF time to be equivalent to 4 hours of IFR time. So the course could be undertaken with 50 hours IF logged, rather than 200 hours IFR logged.
This difference disappeared when EASA came in to force.