Answer
The pilot should perform a final current airspace and restriction check at the site, including temporary notices, active zones, permissions, and local low level traffic risk. If the live check conflicts with the office plan, the flight should be changed or delayed.
Explanation
Airspace planning is not finished just because the route was planned earlier. Dynamic restrictions and low level aviation activity can change during travel. A final pause before takeoff catches changes while the drone is still safely on the ground.