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Nope, not an M3. There's no vent on the front quarter panel.

Another way of checking is doing an MOT lookup.
Screenshot_20211220-092356.jpg

It's a diesel!

thank you for your commentary. I completely did not think to check plate number. and you don't like disels cars?

I have a diesel as my commuting car and I'm not a fan of them, I think they're a lot more harmful than we were lead to believe.

I also have an M5 so I'm slightly biased towards petrol engines.