@HHI OPS --Yes Sir ...Just the routing
for the said departure, AVOIDing Greenland FIR
Random routing:
ETD LHR 0200Z/SFO
ETD SFO 0900Z/LHR
@Heathrow Airport
If the expired tracks is not conflicting with then active tracks
Then expired tracks can be used as random rtng
Alternative is to fly random based on shortest dist, fuel or other considerations
Usually the great circle is ideal under normal circumstances
Random route must also not be conflict with active tracks for the day
OC