In most common driving situations a car having traction control is a positive thing. Unfortunately there are some scenarios where traction control can be less than useful such as in the snow.
When it comes to turning off or disabling traction control in the Astra H it is quite simple if you have a sport button. If you are lucky enough to have one, then you simply have to hold it down for 5 seconds whilst the engine is running and it will display on the dashboard that it has been turned off. To enable it again repeat the action; hold down the sport button for 5 seconds.