Updates: I rang the dealership to clarify the warranty issue and was advised to contact my insurance about covering the cost of the tow. Insurance company declined (too far, they only cover emergency tow to nearest garage). In the meantime, the AR RA truck arrived. The man sat in the car, told me the car could still be driven, but would need to be looked at. I explained that I needed to clarify who would cover the cost of the tow to Dublin. He suggested that the car be brought to his garage in town, to check the codes, and I could drive down. I rang the dealership again to ask if taking it to a local garage wouldn't void the warranty, spoke to a different person (first person on lunch break), who sternly told me repeatedly that the car is covered under warranty for a tow to the nearest AR authorised dealer, and advised me to get back on the phone with RA and ask them to send someone to assess the car and advise if it could be driven to Dublin. I did that, was told that yes, covered under warranty up to 50km, but since the distance in my case wasn't that much over the max, an exception could be made.
A courtesy car was also arranged for me via Enterprise rent-a-car; an Opel Insignia.
By 5pm, I had the courtesy car and mine was collected (felt so sad to see her go) ?
I lost an entire day of work trying to sort this out, seemingly to the delight of a colleague from work who mocked me for not buying a popular car (I'd consulted with him prior to buying). Told me how when his brand new BMW had a similar issue after three months, he received a replacement car. Even showed me a recent letter from BMW that was them checking his level of satisfaction, asking if he had any issues with the car based on his "individual driving experience", reminding him the car would be due for servicing soon, etc. I'm sure others who saw what was happening would have thought the same about my choice of car. Oh well, I still have no regrets.