There is an inertia switch under the bonnet, usually attached to the bulkhead on the nearside. It is a small black box with a 'button'. Its job is to cut power to the fuel pump in the event of an accident. Best to check if the button has popped and needs resetting. It is a useful place to check for power to the pump, when you first turn the ignition switch to 'ignition' position, you should see 12 volts on the terminals of the switch, the 12 volts will disappear after a few seconds if the engine has not started..
