I restored and flipped Triumph TR3s, TR4s, 250s and TR6s back in the 70s and 80s. I'd typically put one of two bumper stickers on a finished car,
Lucas: The prince or darkness
or
Englishmen drink warm beer because they have Lucas refrigerators
The second was my favorite.
Years later I read that they got the contract with Boeing to supply all electrical components for their airline fleet. Scary.
A friend had a bumper sticker on the back of his TR6 - “Lucas: Father of the intermittent wiper.”