Ligier Be two cabrio Lewes 11 7 2023

I am puzzled by this little car in Lewes. Most of it seems to be in flawless condition, but two sections of the tubular frame seem to be quite badly rusted and the wing mirror on that side seems older. I have never come across this make of car before. Normally I use the UK registration number to identify makes that aren't obvious, but only part of the plate is visible. Then I noticed the Ligier branding on the cill which helped in my online search for its make and model.