I thought night flying was IFR and that there is no rotary IMC.
No rotary IMC? What was that I flew in last night then, scotch mist?
Edit:
Ah, I think you meant rotary IMC rating.. no, there is no such thing, never has been.
If you read between the lines in the UK regs, all rotary night flying (i.e under IFR) can effectively be pseudo SVFR.