...As a result of my abrupt kerb visit in August. Is it possible to have it pulled straight without resorting to stripping everything off?

Lower front wishbone took the brunt so if anything is out it will be the lower chassis rail in the engine bay.

I ask 'cos it was enough out when I got the wheels laser aligned to raise the old eyebrows - Mind you I had heard anecdotally that the original Luego Viento jig was a little rustic in it's dimensions...

Did you use a good old fashioned tape measure to check your chassis mounting points?
Try checking them diagonally from front to rear. It could be someting other than your chassis.
Allways try lots of things before jumping to expensive conclusions!

Try a good old straight edge against the chassis rails. It might give you a clue. As already mentioned, tape measure etc etc.

Does it drive in a straight line (on a level surface), does it pull to one side, or go round left / right corners equally?

All been aligned to drive straight but it must be crabbing to do so (by a small amount - say 1 deg).

Haven't done precise geometry checks but that was next on the path - Wondered if others had come across similar problems and what is the concensus? Are there locost straightening techniques?...

kit car chassis are never straight (apart from mine 2 years ago) thats why you need adjustability in the suspension, in my view either adjust it uot and forget it or sell the car!