I think Caterham were able to use the Seven name with no issues as they bought the rights from Lotus but it was Westfield that was successfully sued by Caterham. My Dad has a pre litigation Westfield, called an SE. I think originally Westfield made 130 odd and called them the Seven. Then changed them slightly (ditched the ally bodywork) and called them SE. My Dads is one of the last of the 605 SE’s made until Caterham sued them and they had to change the body slightly. I’m helping my Dad do some work on it at the moment. Immense fun.