It's not a Vantage, but a "regular" V8 Shooting Brake - "regular", because only one Vantage Shooting Brake was ever built, compared to the vast number of three V8s. In addition, Aston built a V8 Volante Shooting Brake - called Volante because that's what it was before the conversion. After the conversion it had a fixed roof.
I think we can call this solved anyway. You have your point - the first one! Congratulations!