After seeing the episode of Wheeler Dealers where they fixed up a Jensen Interceptor, I was inspired to contact Martin Robey to get the production files for the two Jensens, along with certificates of origin.
Along with the production records I received a number of warranty claims and letters between Douglas Marriot (the original owner), Charles Follett (the dealership), and Jensen themselves. I now have a lot more to add into the History of Jensen Interceptor 128/4633 page, which will be up very soon.
Douglas was an architect, who designed the iconic Millbank Tower in London prior to setting up his own practice, which is still running today. Douglas passed away some time in the late 90’s.