how do you handle sprint and Unnatural agility?

By jack_px, in Dark Heresy Rules Questions

sprint says that if you make a full move action, you may move an extra number of metres equal to your Agility Bonus.

So in this case if you have an agility of 40 and the trait Unnatural agility, you can move an extra number of 8??, or just 4 meters?? I mean in this case, the rule of: ''Applying this Trait to Agility does not increase a creature’s movement. Movement is based on a creature’s unmodified Agility Bonus.'' Does count here too?

thanks in advance

Unnatural Agility does not modify movement speed in any way.

Unnatural Speed modifies movement.