nigelh - you have been misinformed (assuming that you are doing this in the UK). For single-engined helicopters, if you have more than 100 hours on type and operational experience on the type within the last 5 years, there is no requirement for refresher training. All you need to do is to pass the relevant type rating approved theoretical knowledge examination and a proficiency check. I suggest that you point whoever told you that you needed 2 hours on each type in the direction of LASORS para F9.1.
In the case of multi-engined helicopters, you need 350 hours on type to transfer the rating, hence the need to do the full type rating course on the A109.
As the CAA have finally got their act together and published the derogations, these arrangements will now remain in place until 31 May, after which the EASA rules kick in.