Birkin won in South African court. Think I've got it somewhere...
It's all greek to me, but section 23 caught my eye:
[23] There is a small group of people w ho are passionate about old
and inconvenient cars and who are prepared to buy a replica of a car
7 designed in 1968 in which the designer himself had lost interest in 1970.
Caterham vs Birkin Legal Ruling.pdf