If he can keep his workrate up he can definitely cover 6, though I'd not start him there since his lineout threat is even less than Haskells.
However, after the RWC, we may see something like 6. Vunipola 7. ? 8. Hughes, where Hughes does the lineout work.
However, after the RWC, we may see something like 6. Vunipola 7. ? 8. Hughes, where Hughes does the lineout work.