"The Scottish Green party is a hard left, very vocal party who have msps in the Scottish parliament and a very high media profile- as does the English Greens. "
To be honest, we only hear about them in Wales in the context of independence. As far as I know they are pro-independence.
"Yes, but there are far far few people in NI, so of course they have a smaller proportion of the vote."
Well, of course, that is my entire point.
"This is in spite of everyone seeming to know Sinn Fein. Why is that? I'd hazard a guess at it being because the British media continually linked Sinn Fein with the IRA during the Troubles, while failing to link the DUP with the UDA (and others). "
Yes, you're probably right. I would blame the media for that, not the British people themselves. I don't think it's reasonable to expect people to be going on the internet to spontaneously research parties in Northern Ireland. People are doing it now though.
I've been watching one of the debates/ask the leader programmes almost every night these past couple of weeks. It's taken my time (I watch Wales specific and UK ones - still got a few to catch up on) and after that I go to bed rather than go on google to find Northern Ireland leaders' debates. I don't think that makes me apathetic or ignorant.