OK, I will try and keep this as simple as possible. I can now fit these lamps in approx 5mins a side.
You will require-
1 x 7mm socket/spanner/pliers
1 x 13mm deep socket and ratchet 1/4 or 3/8 drive preferred.
1 x pliers
Car before-

Turn steering fully right to do right hand lamp and left for left.
Remove these 3 rivets by pulling the head outwards with pliers,

This is what they look like once pulled,

Remove these two 7mm headed lower bolts-

Pull lower panel out from above the bumper,

Now lay on your back, put are up behind inside the hole being careful not to pull on any wires inside and undo and remove the 13mm nut on the back of the lamp unit, then remove lamp by gently easing the front outward first.

Twist bulb holder anti clockwise and it will come out. Fit in to new lamp unit and refit in reverse order.
Job done
I know it's fiddly but its the easiest way I have found without removing and damaging the blind rivets securing the arch liner to the wing. Hope it helps