OK, so these are "brandable" names, i.e. you think they would make a good brand. Personally, I would not approach companies with "brandable", because there is literally infinite possibilities that they could go off and reg themselves. I would only approach a company if I had the very best generics, i.e. claims.co.uk, injuryclaims.co.uk, accidentclaims.co.uk etc, but it's up to you, whether you think it's worth your time.
With a brandable, I am either going to "hold and hope for offer", or get a site on it. If I put a site on, it's either going to be ranking the name with a for sale notice so the right domain buyers / end users will see it, or going straight ahead and creating a monetised site myself.
In this case, I would probably look to build a monetised site, which I could then sell on if I wanted, as I think the chances of a pure domain sale are low.
Hope that helps.