NOx emissions tax. The death of the UK import?

Reading up on this new tax it would appear solely designed to put am end to the UK car imports flooding into Ireland. The tax makes it now almost impossible to pick up any kind of a good deal by shopping in the UK as the new tax will be piled upon the VRT. For example, someone thinking of buying a 4 or 5 year old Golf in the UK UK or Northern Ireland could be hit with almost 2 grand extra in top of VRT. Now call me a cynic but this puts the ball squarely back in the Irish traders court and they'll be able to hike their prices again as it's no longer viable to travel.