There's a different avatar accompanying your posts every time I read them. Maybe you should stick with Audrey Hepburn in "The Nun's Story". It really doesn't matter whether the estate was £436,000 gross or net. The point was that Jeremy would inherit the lion's share with five people out of the way,brutal as it may sound,and there would be no interregnum in Jeremy's mind wondering whether June would leave her money to the church,or Nevill would become disgruntled with his performance and leave his money to Sheila and the twins.
Hi Steve_uk
You will recall you found my initial avatar, a plaque of the Mother Mary, offensive so I changed it!
You see sacrilege and vulgarity where others don't. Admittedly the above as an avatar with the contours less defined could be described as ambiguous. My current avatar is themed for the festive period. I will think of something more permanent in the New Year. Thank you for suggesting Audrey Hepburn/The Nun's Story but I would find this inappropriate as she accepted the vow of obedience whereas I don't and would not want to mislead.
Some might view my avatar as a bit of a side-show

I don't. Imo the themes are highly relevant to the case ie chastity, sin, prayer, the devil, evil, good v bad, bad blood etc, eg Sheila as "The Devil's Child" and Jeremy as "Evil Beyond Belief".
It really does matter whether the estate was 436k net or gross. If Vidvic is correct and the estate amounted to 4 x 80k: AE, DB, AP and JW = 320k, this would mean the inheritance tax liability was circa 116k and provides a valid reason for Jeremy selling off family heirlooms etc with some urgency.
Why might Nevill be disgruntled with JB so much that he leaves his money to SC? Whilst I have every sympathy for SC being brought up by a mentally ill and unsuitable adoptive mother, and who in turn developed mental illness herself, she was not exactly the model adopted daughter. Imo this is entirely understandable given her innate sensibilities, upbringing and mental state. Would NB leave his hard earned cash to SC with her ever increasing use of recreational drugs and rapidly deteriorating mental health?