please take note of the part number supplied ,While these switches may look the same there are a few part numbers so please make sure you are buying the correct one before ordering.
The switches simply push out from the rear (get your arm up behind the foot well cover ,Push the switch out from behind and the part number is printed on the back of the switch.

Description
Astra J / Insignia LED Headlight switch
Part number 13268695  

Available in a choice of 6 colours
Blue 
Ice Blue 
Cold White 
Red 
Green 
Pink

Compatible with all Astra J / Insignia models with Part number 13268695 headlight switch

Delivery.
RM24 postage (Mainland UK)

Returns.
30 day no quibble return policy.