Hi Peter,
sorry i don,t know how to do a link
but forum member "Gus" put a post on my "Big Day" thread (in the chassis section) with an attachment of what he did,
basically put in a brace from TR2 approx 30cms forward of the TR8 junction back to TR8 to more or less where TR5 would have met TR8....if that makes sense
might also be worthwhile doing the same to the passenger side too
cheers
andy