Hmmmm the wide body option……dunno LeTigre.
If you are talking about say 12 cities that’s a lot of wide bodies you need with downtime @ LHR. And I reckon there would be two or three euro cities tops that would fill a daily A330 say with decenlty yielding transfer traffic.
Also if you need to fill each of those wide bodies on their once daily flight from XXX-LHR with transfer traffic you are going to have some serious waits in transit @ LHR for some onward destinations – unlikely to be very attractive for many of the less cost conscious traveller.
VS should have focused more on jointing Star or Skyteam than launching their own feeder flights IMHO. I can’t think of another example where a long haul carrier has launched their own short haul carrier to feed it in recent times. Short haul carriers dipping their toe into the big wide world and flying further afield, yes. But the other way around – airlines codeshare or join alliances.