Good News, The Boot Floor is now Welded in! This is my first ever proper welding experience on a vehicle so it wont be the best job in the world but theres room for improvement as i go along. The Panel was from a cutout of a Scrap Rover 200 and i managed to get that sand blasted and painted ready for this job.
As you can see from the photos the boot floor is pretty rusty all over, and underneath was worse. i cut out the worst effected area and went back to bare metal in the lesser effected areas.
I trimmed the repair panel to size to fit the hole that i made, this took some time as i wanted to butt the panel in so there was no lapping. i made a 1mm gap and got away with welding the panel in. Once that was in i grinded the welds down, used Hydrate 80 to treat the metal that originally had rust on it, then used electrox zinc primer to protect it. Once that was done, i then used tiger seal to seam seal the weld that i did, then once that was set i then overpainted it with grey primer to prepare it for the base coat when i get round to doing that at a later date.