There was a BBC documentary film made about Judith Chisholm's preperation for her round-the-world flight, 'JUDITH CHISHOLM. ....If the sharks dont get me....' which is available on-line in DVD format. I remember it being on the telly.
Her biography used to be available from her mother, now sadly passed away, who was the author. Hopefully it is still available.
Incidentally, the TV film was made by Yorkshire TV, not the BBC. I do have a DVD of it, if anyone is interested. ( I was Judith's husband).