I what proportion of that 10,000 people are doing it because they dearly care about the unexpected environmental impact of their cars*, and what proportion have just figured out a great way of making an extra three grand?
Also, facepalming over the comment by Sadiq Kahn at the bottom of that article. Not sure if he really understands that the "unpaid congestion charge" is irrelevant to the matter at hand, given that the congestion charge is based on CO2, which is not one of the emissions in contention with the Dieselgate issue.
If VW should be charged for its cars emitting more CO2 than is claimed then so should basically everybody else, since any vehicle forced to sit in London's traffic will be burning more fuel (and therefore producing more CO2) than is quoted by the manufacturer.
* I mean genuinely care, rather than the VW owners who talk out of their arse on the internet about how much "cleaner" and "more economical" their cars are than the hybrid equivalent despite that never having been the case.