If I remember correctly when I worked at Shellys in Wellington, it was owned by a local surgeon, he also had a Jenson Interceptor, I recall his wife came to pick it up one day, I gave her the keys, we had parked it in the drive for her, she came back a few minutes later, she said I can't tell which car it is?? I took her out to the drive, there happened to be two other Boston Green cars there, one 3 series & one 5 series, she couldn't tell, even with a remote key!!
man did I laugh!!