ULEZ and how it effects the Gen1:

[mtread]

I still think TFL have cocked up here, and MAG know that. TFL haven't defined the process of applying for exemption. They can't get away with saying they don't record the model just because of cost. Anybody who can prove their model is the same as one which has been successfully exempted would win an appeal in court. Plus costs. TFL can't afford that to happen.
I think there's still some way to go on this, but as Dazza says, if you want to be certain from the start, get it done.