Are v rated tyres legal on a zs 180

[maxtherotti]

Hi all
I have just had 4 new tyres fitted to my straights and the garage has fitted v rated tyres (yes I asked for w) but he raised a point that as a v rated tyre is rated to 149.1mph it is above the capabilitys of the car hence fully legal
I should add he did me a good deal on them and is happy for me to take them back and change them on monday for some w rated (at a extra cost to me tho)
So my question is
Is it fully legal as the tyre is above the cars operating capability even tho it is below the manufacture fitted standard (which was a y rated tyre on the early ones!!!)

Cheers Rob