They class them as cars not vans. Emissions are exactly the same though!
Mine is a genuine CSW (I have the original receipt) with an M in the right place in the VIN and Estate on the V5. They (TFL) did something in March which removed my previous exemption which is ridiculous because nothing has changed with the car so overnight I would have had to pay the charge. I spend a lot of time just north of the LEZ boundary so will easily go I to it. The 110 is parked up for a chassis change so not in use currently so I haven't been caught but I now need to register it with them along with photos.
That idiot mayor is changing things again in October though as the ULEZ is expanding so I will wait until then to register as I think things will all change again.
No thought has been given to people with little money inside these zones - I have family who struggle financially at times who will be affected by these changes. They simply cant afford to scrap and replace their old, non compliant, vehicles so the 'mayor of the people' forces locals out or onto the breadline further ... great move.