Hello - thanks for all your info, looking at the 2 sparks i did manage to take off, they are not right. They dont have the fingers at the top, and looking with a torch into the holes, I can see the 3-prong fingers stuch in there. So that means I have 4 plugs that cant be taken out. I thought about sticking a long screwdriver in between those fingers amd twisting it out but I dont want to as they will probably snap off into the cylinder.
So it looks like the head has to come off - good opportunityy to get that lightened and balanced 2.0 9a bottom end mated with a new polished and ported KR head that I always wanted - cant find any! I think my most likely route will be to keep the 1.8 KR bottom-end in the car, and buy a refurbed but not modified KR head and use as a daily driver.
There is no shortage of 2nd-hand KR heads on the market, but they are all old and i might as well get one that has been refurbed with new cam chain and valve seals etc (polished and ported not absolutely necessary for daily driver - but would be nice

).
Anyone know of any companies who sell complete refurbed KR heads? thanks!