Do you think yours is solenoid related or just stuck like mine was?.
If you can lean over enough from the seats without putting to much weight on the boot floor you will be able to undo the screws easily enough. Next part will be trickier but again if you can at least get the top half of the trim away you should be able to reach down and manually pull up the door release. (the long thin coat hanger type bar on the right - Post #5). Should be able to remove the rest from outside the car when the boot it is open. Might need another set of hands or two to keep the lid still .
Good Luck
i have recruited my neighbor for the job.i think the solenoid is fine (it makes that long "jee" noise when i unlock the boot) so i will try my best here!i shall post my findings after i attempt it