trade policy's are getting stricter than ever now, if he's only a named driver on another business policy then i would assume that he should only be driving for work use of the named business, as most policy now dont allow social and domestic for named drivers,
so i doubt they would allow it to cover a named driver for use as another business
this is just my opinion but i know how my own policy and many other freinds in the trade have recently had our own policy's amended by the insurers on renewal to ake them stricter
as for the waste carriers licence then he will defo need his own,
i actualy know somebody that has 2, 1 for his skip business and another for scrap metal as he was fined for the scrap metal because it wasn't covered by the skip 1 for some unknown(to me) reason