Bristow's in Norwich do a Single engine IR on a 206 which then needs upgrading. It's the only approved single engine IFR A/C (I think) so only really serves to prove you can do an IR.
When I joined CHC that is what I had and they paid for my upgrade which I did with the 332 type rating. It didn't add much cost to just a type rating and CHC knew I could do the IR.
A few years later they lost a lot of money sending people to Cabair who failed IR's so even though you can't use the single engine IR it does serve a purpose.