Had a day off today so made some more progress. Welded in bracing prior to starting to cut out the rot.
I've started cutting out the old repairs / at the near side front.
So, I need to replace wheel arches / sills on both sides, and both front spring mounts are showing signs of coming through the floor, although the floor around the mounts appears to be sound
Looking at the crossmember it appears to have been plated around torsion bar mounts and is showing signs of delaminating, so I'll probably replace. So the question I have is what order should I do things in - the spring mounts I will tackle when I mount The car on the rotisserie, can I do the sills a side at the time by supporting the car on stands under the spring mount and chassis legs ( which are new), can I leave the crossmember until after I have replaced the sills, when the car will be on the rotisserie - by leaving the crossmember in situ it gives me a reference for installing the sills?