g-vred movements

On the flight movements page of this website it says that g-vred has been flying between lgw and lhr a lot. i can see this is because the bgi flight now leaves from lhr but returns to lgw. why is this. i am mistaken or didnt it used to fly lgw both ways.
Also, because vred is the newest in the fleet, and therefore in the best condition, why are VS not flying it on its biggest routes like LAX,SFO,HKG-SYD,JFK?
Also, because vred is the newest in the fleet, and therefore in the best condition, why are VS not flying it on its biggest routes like LAX,SFO,HKG-SYD,JFK?