but doesn't that repair in the last photo' need to be seam welded?

Acceptable methods of repair
It is essential that repairs to corroded or damaged areas are properly carried out. This requires that suitable materials of appropriate gauge or thickness are used for repairs. Additionally:
- Any plating or welding extends to a sound part of a load bearing member.
- the repair must appear to be virtually as strong as the original structure with only continuous seam welding being acceptable for patch repairs (even if the patch extends beyond the prescribed area).
- spot welded joints are acceptable where the original panel has been replaced to an existing spot welded flange (provided the original defective panel flange has been removed). Stitch or plug welding is acceptable as an alternative to spot welding in these cases.

Sorry Neil, don't know what ''seam welded'' is? It seams alright to me

The seat belt and bumper plates are spot welded from the factory, so is the inner mudguard.

When I remove floors, sills and corner posts, I always fit both doors before welding to make sure that nothing saggs and that everything fits nicely. I hate doors that can't open and close properly. At the same time I use a jack to lift the body so the pedal floor is straight.

A seam weld is a continuos unbroken weld as opposed to stitches of weld with gaps between them. I wouldn't think the seatbelt bolt panel would have to be seam welded if you're welding it to a new inner wing (in the uk) because you're replacing a whole panel as original, not repairing a panel with a patch.

Great, all done. Ready for her new adventure down under. Container coming soon.

Great work! How long before it touches down in it's new home down under? Be great if the new owner came on here and told us of it's future adventures.