I completed the fettling of the the new timber for the nearside of the boot perimeter rail today and screwed it in place.  One problem I encountered was that the timber had not been cut to width accurately by the supplier so I ended up having to take about 1/4″ of the deepest face.  However the rail is now fitted and the joints with the verticals have been profiled so all is well.

New perimeter rail and repaired pillars

New wheelarch timbers and steel flitch plate