I don't understand exactly what in Will's post is not clear - he is 100% correct - this whole matter has been 'out-in-the-open' for some time now and all that Will has stated is available from published sources.One (apparent) source of confusion may be due to the incredibly stupid media, who persist in stating that any car made from 01/01/15 onwards will be compliant - this is true, as all cars made from this date and sold in Europe must be either Euro IV (Petrol) or Euro VI (Diesel) compliant, but many, many cars made before this date are also compliant - the 'TfL checker' pulls information from the DVLA website that reveals the real story.Nobody, not even TfL, knows what will change in the future, but you can be sure that if your car is currently compliant according to the TfL checker, then it will continue to remain compliant for at least a few years - there are (currently) no standards existing beyond these, so it is impossible to know at this time just what TfL could seek to change in the future...
David Noades ● 1901d