Virgo - no. Go did not ever use BA aircraft or Pilots.
The crucial difference though is that Go was never going to affect BA's core (80% of profits) business - the North Atlantic. OS aircraft will be carrying passengers that would otherwise be on Mainline seats, and it's very easy to extrapolate from that why BA will use this to drive down everyones pay & conditions, and thus why I'm 100% behind the BACC....