First thing first, you need to unclip all the clips on the back of the hood and remove the carpet and the sound proofing to expose the metal plates that cover up the engine bay and the fuel pump.
You then need to remove all the bolts that holds the metal plates in place and remove them to expose the engine and fuel pump.
Remove the electrical connector first, the remove the breather pipe (black rubber pipe), and finally remove the fuel pipes (green and orange). Once you have remove these items then unscrew the large red retaining ring.
Just for you information I replaced the sender unit and fuel pump (which is easier and quicker IMO)
There should be a rubber that will either stay with the sender unit or stay with the petrol tank (in this case stayed with the petrol tank). Drain the left over petrol in the petrol pump and store it somewhere safe.
If the rubber comes out with the sender unit, then remove it and re-insert into the petrol tank hole. The new sender unit should sit in the hole perfectly without any problems and all you need to do then is screw on the retaining ring and reconnect all the pipes then re-attach the electrical connector. This is the fuel pump replaced, but make sure you try turning over the engine as it should fire up straight away without any problems.
If the engine turns over ok with no problems, then all you have to do is place all the metal plates back on
The screws that was in mine were slightly rusty so I replaced them all with SS bolts which will never rot
Put the soundproofing back into place as well as the carpet and the job is complete, however I have a piece of sheeting that I had made for the F VVC so placed that on top of the carpet and it gives off a Lotus look IMO
Hope you guys find this thread useful