Yeah but you can only use those no claims with direct line as other insurers wont accept them as proper no claims. And because you are the named and main driver you are actually fronting so you can get royally arse f*cked if you get caught.
We split the car use roughly 50/50 I drive to work with her, she takes it on to her work, she dirves back at night, I drive it home from my work and I do the weekend driving.