I know where I stand in terms of spotting in the UK, but I'm unfamiliar with rules and laws on IE so I didn't really want to risk it, especially since i left my passport in belfast. I ended up going to a strip of grass along side the road with a good view of the causeway and got some good shots there.
In terms of the taras, I saw a loaded one pass me around Howth junction, which if the Drogheda commuter wasn't late i would have seen. I saw the same train return later empty before i got kicked off the station. Another loaded one may have passed by while i was in the casino model railway, but I didn't hear anything that sounded like an 071.