I live in the next village to Borley, Pentlow. I've lived around there most of my life and met some of the participants (including Marianne's maid and many of the Choir who knew the Bulls). I was a friend of the late Trevor Hall, who did the SPR's investigation, and who interviewed Marianne. The whole story (and I have all the literature) is a most amusing testament to the eccentricity of rural life in the early 20th century. Obviously, I know many of the people who live in Borley, including the people who live in the CoachHouse and the Hall.
In short, there is absolutely no doubt that the entire story was fabricated out of the experiences of a number of gullible people. I do not think it was malice, except perhaps for the contribution of some of the Bull family. It amazes me that the hauntings are still related as fact in spite of all the evidence to the contrary.
I thought that the book 'The Widow of Borley' was a bit harsh, an I hope it caused no hurt to you or any other of her relatives. The people who live in Borley have suffered too, and are absolutely fed up with the whole matter.