There was a small patch at either end of the sill on the lip underneath, these where cut out and new metal welded in.
Next it was the rear wheel arch, initially this looked solid, but after wiring brushing with a cupola on the grinder became paper thin on the outside, and the inner was again shot, so no option but to cut it all out. I am certain that any water was not coming in from the joint of the inner to outer wheel arch as this was rammed with sealer, I think it may somehow come down from the fuel filler and run down the inside and then become trapped behind the sealer.
The rear lower section of the O/S rear wheel arch was similar, again the outer was cut away to weld in new metal firstly to inner and then the outer.
All welded up, not pretty, a little bit of filling required. Monday the car was taken to a friends workshop where it will be kept over winter, we have the ramp there so will be easier to work on the near side which will probably be worse as that is where the puddles on the road usually are.
I will have a break for a few weeks now as we have a week on our shared narrow boat coming up.