I'm in the same position my car was built on the 21st June, I was able to watch it go through the lines, delivery has now been given as the first week in August. This a problem for all JLR models they are all on hold. I have done a lot of research and I can't understand why they are holding cars they were built to order as the requirement comes in on the 1st of September.
All manufacturers are having the problems VW are stopping production on some models for 2 days a week till they have been done, BMW have dropped at least one M3 model, Porsche are not accepting build your own orders on any model. If you check the
www.vca.gov.uk web site and check fuel consumption and car TAX etc JLR only have MY 18 except the iPace which means VCA haven't approved any of the diesel or petrol cars.
In the new regulations each model variant including options has to be tested so a sport with 20" wheel and standard audio would be one test and if the audio is upgraded that is another that means the manufacture have had to supply tests for all variant and all options that effect weight, electrical consumption etc as this has an affect on fuel consumption and emissions.
I was under the impression that JLR like all manufacturers in the UK have a two week shutdown in August so I would think they would want this sorted so they can get the deliveries rolling again before then. If they don't get approval that would mean a complete shutdown of production for JLR or any model that doesn't get its WLPT results approved/accepted as the new vehicle do meet Euro6 it's just they must also have an approved set of WLTP results.