Ok, firstly, the difference between Irish and UK tax is very little in every aspect. The French situation was very different as the social was huge. Not the same difference twixt the UK and ireland.
Also the Tax agreement between the two countries should be looked at, so should the European law of transport workers being taxed in the country where the business is registered.
The bottom line is........... as there is so little difference between UK and Irish tax there will be no big surprises on the horizon. If you are forced to pay UK tax you can claim back the Irish you have paid or due to the dual taxation agreement you could claim back the difference.
Chillax!!