"What do you mean by "when Cardinal come to extend their licences later this year"?"
I was looking at their website which states several of their licences were pending extensions in Nov 2006, are these collectively the "Rudis" fields?
I agree that the prospects for the value of Ukrainian assets looks very bullish, the main stumbling block would appear to be how the relationship with their Ukraine partners (Ukrnafta) pans out. Not sure if Regal and CNGG is a fair comparison but it makes one a little wary of goal posts being moved esp as gas becomes a super "hot" commodity and CDL is still a relative minnow.
Either way it looks like another good risk/reward to me, I took a position on the 23rd, fingers crossed that both RPT and CDL come good this year, the next few weeks should be very interesting. Happy new year.