Despite what the planespotting websites say, G-VIIO has not been written off yet.
Damage isn't as bad as first thought, although not an official word it's likely to be repaired. Problem isn't the wingbox, as previously mentioned the fuel tank wasn't penetrated. Fuel leak source was engine #1. If wing spar isn't significantly damaged, a new engine, slats, composite panelling and a repaint etc will see her fly again.
According to the latest news. One 744 and 767 from our longhaul programmes will remain for an extra few years.