Fuel pump is located in the fuel tank, which is situated behind the left of the rear seats as you are looking in the car from the boot.
Open the boot, push the seats forward and lift up the carpet. You will see a large black plastic ring and some wires. It is just a case of disconnecting everything here and unscrewing the ring to gain access to the tank. It is advised that you disconnect the battery first and do not smoke lol. You will find that common sense will help you decide in which order to remove things.
Once you have access to the tank, put your hand in and feel for the pump. It is housed in a cradle that is slotted into a securing point. Take a hold of it and slide it up towards the top of the tank and it should come out.