Duncan, Skarloey, Duke, Sir Handel, Peter Sam and Rheneas
Note: George's face is crooked
A pile of asphalt is seen in front of George...
... while in this scene a pile of gravel is now in front of George and his face is crooked here.
George at the level crossing with his face being clearly out of place
You can see wires from the servos coming out from under the van into Sir Handel's cab.
George's face is crooked when he is just about to crash into Sir Handel's trucks
You can see a workman figure on the left of the screen which has fallen onto the stone wall and George's face is crooked.
You can see black tack holding the workmen upright on the set.