Started to repair first window pan today. Made a new lower flange section and welded it in place, not quite complete yet.
First stage, a few tack welds to hold it in the right position
Then start to weld the seams, spot welds to avoid distorting the existing frame.
Cleared a space in the garage to start window pan and flitch plate production. Marked up the steel for cutting the first repair sections. I have some 3.5mm galvanised plate for brackets and flitch plates.
Removed rearmost nearside window pan today.
Window opening
Rain/draught excluder
Window after removal
Timber frame corner of rearmost window
Top left corner of rearmost NS window