Hopefully this will be the last word I have to say on the abysmal "Documentary" the Secret World of Lewis Carroll.

On IMDB Jenny Woolf has added another interesting note regarding the supposed Lorina Liddell photo: 

The provenance of the photo has no connection with England, let alone Carroll. It was bought from a French dealer one of whose specialities was 19th century French medical photographs, and the photo shows the girl's spine is crooked - a fact that was obscured by the BBC's selective use of the photo. The present owner of the photo, a museum, did not appear in the film, and has never claimed the photo is of Lorina by Carroll (it is only "attributed" based on an anonymous inscription on the back.)

This backs up Edward Wakeling's 1993 assertion that the photo is not by Carroll (this assertion is of course, not given any airtime in the documentary).

I also made a highly imperfect IMDB review, but Jenny Woolf's is far more in depth on the subject.

Sadly I highly doubt any of this matters anymore as the damage has irrevocably been done.

Am told the documentary is now on a certain streaming service so looks like although Edward Wakeling managed to make sure it was never repeated... it has still been exported.