For a PPL or CPL who holds either an IMC or a foreign IR however, it looks pretty good.
For a UK/JAR/EASA IMC holder with 30+ hrs PiC/IFR it looks like 5 hours in an FNTP1 and another 5 airborne training, nominal 2 weeks self study, one day in the classroom, written(s) and a skill test.
Assuming, of-course, you can get to test pass standard in those hours, which is always an issue for anybody.