Lets be sensible about this whole scenario.
We all know that the more fuel you use the more emissions there are. Correct?
Everyone I have spoken to agrees that in real life fuel consumption NEVER meets the figures published by the manufacturers of ANY vehicle. Correct?
Therefore it follows that the Emission figures in REAL LIFE motoring are greater than those quoted in the Standardised Emission Tests. Correct?
This fact is accepted by the authorities, whether right or wrong, otherwise they would insist on Real Life rather than Standardised Emission tests. Correct?
These are the European Emission Standards.
https://www.theaa.com/motoring_advice/fuels-and-environment/euro-emissions-standards.html
All VW have admitted so far that there are vehicles in Europe fitted with the Software identified in the USA. That software was developed to meet the Much More Stringent Californian Emission requirements which are 3 or 4 times more stringent than the European 5 requirements.
They have NOT stated, yet, that the Defeat Software is activated when the vehicle is tested for the EU 5 standard or the MOT, only that some vehicles have the software.
No one, except for the Authorities and VW know what the impact is or will be in the future.
However, one thing I am convinced of is that owners would not end up penalised in any way or form, because that would put the Authorities, Government and/or EU, in a very poor light and be the end of VW.