I have checked websites of several universities and it seems that there is not any difference between "PhD taught" and "PhD Research" in UK. Is it like that?
Claudia is right, while some PhDs have a taught component (especially the newer 4yr ones), a PhD is a research degree and as such primarily involves the undertaken of novel research.
IIRC, educational doctorates aren't quite the same thing as a PhD as we know it (as you say, they are more like a high level taught courses than research degrees).