AussieRunningman

30mins later, after having removed the rear quarter panel and C pillar panels, and thanks to the "Partscats" link above, I can confirm that the rear lights loom has no separate inline plug, separating it from the rest of the loom on that side of the car. It is simply just another leg of the loom. 
 
The loom for the rear light runs up the right hand rear wheel arch, from the sill. (Right hand side being for drivers side).
 
The wiring was all intact, however I did find that there we two EARTH wires that had not been put back onto an earth bolt. Found it by accident as I removed the side boot panel, I heard this metallic "ti-shink" like a washer or nut falling off, so I invetigated further and found these wires with washers on the ends just dangling inside the panel cavity. These two earth wires are different, one coming from the rear lights wiring loom, the other coming from the top of the tailgate door, so perhaps the rear wiper works now as the tail light in the door already worked. The nut that should have been on this earth bolt was nowhere to be seen, so I put a suitable locknut on, started the car, and tried all the lights and all worked. So it was simply an earth continuity problem.
 
Also found that the hail repairers had not put back to interior panel screws, and had replaced another screw on the top of the V pillar cover with a screw rather than a bolt The bolt has a fixed threaded nut-sert fixed to the body, while the screws screw into plastic inserts pushed into holes in the metal. Off to local car parts shop to find replacements, as I will not be taking the car back to the hail repairers to do it, who knows what they will bugger this time.
 
So all sorted, no need for the wife to waste her entire day going to the Dealership and the Insurance company wont get a bill from the Dealer either. Maybe I should send my Insurance co. an invoice for my time? LOL
 
Thanks for your help, and keep up the great work on this forum.
Karl