Thanks as ever for all the encouragement, it helps a lot.
Another 6 months has gone by so I'm overdue an update!
I left you with a pic of a sorry looking sill end.
![](https://i.imgur.com/z74dgLZ.jpg)
Time to bite the bullet and cut it out
![](https://i.imgur.com/YXK82Lp.jpg)
The back end of the inner sill was sort of still there!
![](https://i.imgur.com/wQG3Vvt.jpg)
A new corner piece was needed to link arch, floorpan, and inner wing. Out with the hammer
![](https://i.imgur.com/2APa8Uy.jpg)
And it came out OK
![](https://i.imgur.com/VflH9gN.jpg)
A couple of local patches to the inner sill and an end closing plate
![](https://i.imgur.com/DXnqHZb.jpg)
![](https://i.imgur.com/K4WdYdo.jpg)
![](https://i.imgur.com/vgRM1rl.jpg)
But what to do with this mess?
![](https://i.imgur.com/D5hERU7.jpg)
I used one of Mark's pattern sills for repair sections and them beat the whatsit out of it to get the right profile (2mm thick - heavy going)
![](https://i.imgur.com/MKTRNVs.jpg)
![](https://i.imgur.com/cHwSUC8.jpg)
This bit had to be made from scratch
![](https://i.imgur.com/u0lWZZh.jpg)
![](https://i.imgur.com/nLAad6M.jpg)
Oops
![](https://i.imgur.com/s6N7Z6q.jpg)
Back on with the repaired sill
![](https://i.imgur.com/0zLfWnk.jpg)
Looks good.
![](https://i.imgur.com/SOSOELB.jpg)
A new flange for the bottom of the B pillar
![](https://i.imgur.com/FZWMHhG.jpg)
And in that went too
![](https://i.imgur.com/kNi2sE4.jpg)
Again - happy with the result
![](https://i.imgur.com/djqQ9OG.jpg)
That's the nearside sill & floor and A & B pillars done and hopefully good for another 40 years. Onto the offside rear.