For the boot floor you don't have to use the repair panel. In my case the edges it sits on were too far gone to weld to. I used a sheet of 1.2mm steel. Seam welded round the edges and plug welded to the cross members. I added two cross braces in the boot to stiffen the floor a bit as the LPG tanks will be going in there.
The MoT man was more than happy with what I had done.
The MoT man was more than happy with what I had done.