More than likely a ministers car, given location I believe it's Michael Martin, a lexus, that's 192 D.
I had it one night on South Link giving me the blues as well, he didn't think I was driving fast enough as I overtook a car on the Kinsale Flyover, before he gave me the blues he was flashing however I had no where to go so when I didn't speed he turned on the blues giving me no choice but to speed up and pull over. He flew past me then about 160 I say towards Douglas East/Well Road exit. Caught up with the langer at the lights then.
Just abuse of power.
There's another one if not 2 high performance cars, I saw one in Douglas too attached to the Branch - ones a Golf GTI that 241/242 and the other one I think is Golf R that's 191.
The 242 was actually posted on the Garda Social Media before Christmas