This is all based on the assumption that they were given sound and accurate advice. And whoever gave JM those details had their facts right (no pun intended)
By the looks of the things, even the person who they got advice from didn't know the answer.
Was the advice from solicitor Basil Cock? What type of work did he practice in?
As you know I have experience and qualifications in this area. Although I wouldn't regard myself as an 'expert' as such.
In terms of distributing the estate I don't believe the order of deaths is relevant. The main beneficiaries of the wills all died: NB, June and SC. JB lost his right to inherit due to his conviction. Therefore the laws of intestacy kick in. Had one twin or both survived then yes they would have been entitled to the full estate.
As the twins died the laws of intestacy move on to NB's nieces and nephews and June's mother.
Marple posted up thread the value of NB and June's individual estates. I was surprised to see NB's was significantly greater?
Are the values net or gross?
NB had recently purchased some land in his name but this had a loan attached to it?
NB had fairly recently inherited from his mother but the renovation of a property had a loan attached?
June was a 42% shareholder in OCP. NB didn't own any shares.
I think arguments between the Boutflours/Eatons v Pargeter/Wood revolved around who was entitled to what.
If NB and June had a joint life first life assurance policy this would require order of death but asfaik the only life assurance policy was 10k on June's life covering a mortgage on the Maida Vale flat.