Vauxhall now involved in emissions scam?

[mattikake]

I see there's been an ad circulating Facebook about the above, same as VW employing cheat devices to bypass emission tests. A company called milberg limited llp are pursuing the case to secure compensation for up to 500,000 Vauxhall owners.

Anyone know anything about this one? Sounds too big to be an internet scam/data farming.