Well everyone, here is the final result. We found it much easier to remove the top half of the bumper as well for the re-fit - in fact we wish we had taken the whole lot off in one go to start with, would have been much quicker
EDIT: for those that are thinking of doing this you need to make sure you order the tow eye cover too, as that does not come with the bumper (£5.51 - 1k6 807 441 B). If you are getting the lower bottom section sprayed too don't forget to order when getting bumper sprayed. If you are leaving it in black plastic like I did then just order and push in :)
Before
During
After
Well chuffed with the final result - just the front spoiler to do now!