OK....so I started trying to work it all out concentrating on no distorting plastic of ripping out lips or lugs......this is what I found.
removed wheel arch screws (x2) each side, and pulled back the liner
6x screws on the under tray
all the plugs on the top tray/cover,and the covers over the lights
Central intake grill screw and the side light trim screws, and the side light units with their screw.
2 bolts per side, view the white "turn buckles" in the leading edge fold
Release the bumper D clips with a plastic tool, push it in under the bumper and work along one at a time
(View from Outside to help show clearly...this happens inside the wing ! )

Using the tool I twisted the turn buckles, I used rod both reach and so I could use a spanner (tough to turn by hand)
edit
This is way to complicated.....bend some rod and thin the end.....I was experimenting as I went and the welder was plugged in
Then pull the bumper forward wriggling as you go
