Sure you can, just connect the V+ box to the TVs HDMI port and the dish to the TV's dish port.
You won't be able to record programs from freesat on the V+ though and i'm not sure I see the point. I can't imagine there is much on freesat that you can't get on virgin cable (at least if you have the dish pointed at UK sattelites) and the V+ already has three tuners IIRC.
Make sure you don't mix up the cable wiring (from the road to the V+ box) and the dish wiring (from the LNB on the dish to the TV), they use the same connectors but they are not compatible with each other and i'm not sure how well they will tolerate misconnection.