I already wrote about the TVR Trident. In particoular, as you know, only four original TVR Trident were built. Even if these are only stepsisters of the original four ones (here is an interesting tale of the Trident), here are some Tridents:
THE REGISTERS OF TVR UNOFFICIAL BLOG
so the trident is the rarest tvr?
the rarest noble is the M10 (6 built)