this is for the US models so you might be right... but all UK models get both TCS and VDC
"The 2006 350Z offers a power-assisted 4-wheel disc Anti-lock Braking System (ABS) with Electronic Brake force Distribution (EBD) and Brake Assist. (BA).
Brembo brakes, featuring four front caliper pistons and two rear and larger pads and rotors, are standard on the Coupe Track and Coupe and Roadster Grand Touring models.
Traction Control System (TCS) and Vehicle Dynamic Control (VDC) (not available on all models) work in conjunction with the braking package. TCS uses the ABS wheel speed sensors to detect if the rear wheels are accelerating faster than the fronts. If so, torque is reduced to the drive wheels by altering the fuel injector pulse and controlling the Electronic Throttle Control motor.
Working hand-in-hand with the Anti-lock Braking System and the Traction Control System, VDC can reduce engine torque or apply individual brakes as necessary to help stabilize the car under severe cornering situations or adverse weather conditions."