Hard to believe it has taken me three days to fit the replacement floor boards in the boot, however it was a fiddle trying to get a good fit of the new boards with the old. They are in and screwed to the frame but due to a slight cross sectional warp in the rearmost board I will need to add some reinforcement from underneath to pull the inner edge of the board down level with the rest of the floor.
Once that has been done, the next big job is the frame rail under the rear window.
Yesterday I finished screwing the boot floor OS perimeter rail in place. Today was spent finishing the joints to ensure the side pillars line up correctly for the cladding panels and packing any gaps in the joints. Late afternoon today I removed the rearmost boot floorboard as it is rotten all the way across. This gave me access to the top of the chassis at this point, where a lot of corrosion growth was evident between the insulator and the boot floor support. I removed the insulator and the corrosion growth and treated the chassis top surface with Vactan.
I started work on the OS boot lower frame rail today, as part of the plan to complete restoration of the boot area before moving onwards.