Where is the fuel shut off solenoid for a defender 2.5 turbo diesel located?

Shut off solenoid is located on the fuel injector pump, near the round diaphragm at the tip of the pump, towards the firewall. There is one white wire (usually white) that goes to it. That is the only electrical connection on the pump. The solenoid iteself is round, with a small male electrical blade connector on the end of it. It unscrews from the whole pump for replacement.