Sorry guys, I would like to correct my previous posts: only multi-engine helicopters are allowed to perform IFR in EASAland. I also have heard that starting from this year some Countries within EASA have decided to abrogate also single-engine piston IFR trainers for IR(H) courses, so 40hrs SIM and the rest on twin-engine helo.
Other States permit to perform Revalidation / Renewal on FFS only (at alternate years with the real helicopter).
However let me to express my opinion: EASA Regulation is never clear enough and for revalidation purposes they should permit at least an R44 (and the same category of helicopters provided with the IFR cockpit) or FNTP2 simulator.
It's only my opinion...
Happy landings