But if you ask a normal to name a type of "modern" British train (i.e. diesel or electric), they'd be more likely to say "Inter-City 125" than anything else.
You'd probably get the response of "I don't know" more than anything else.
That said, on the WCML you'd maybe get quite a few say a Pendolino. On the ECML you might get people saying Azuma in a few years. Those are both only down to the fact that they are actively marketed brands used by the current TOCs. If they stopped marketing them as such then the public will largely forget.