Hi april/lookout
I am now wondering if indeed June was a suitable person to adopt children. Not wishing to sound unkind as I know she would have done her best but my feelings are that adopted children need to feel more secure than say a child who is not adopted and poor June herself was not well and she was totally consumed with religion which IMO is not a good influence on a child. Sending them both away to Boarding School IMO was not a wise thing to do although it would be done for the right reasons maybe for the Bambers but not the children. Very very sad state of affairs. I do believe certain traits in a child's behaviour is inherited from their birth parents and other aspects from their parents who raised them. I always thought it was strange when Jeremy's birth Father said Jeremy was a wicked wicked man he seems to forget he is carrying his genes 
Susan,,you'll usually find that religion has a similar effect on a person as drugs in that they are both used to block out reality. Poor June had this religious mania and Sheila as a child would have been brainwashed,,the same as June was trying to do with the twins by making them say prayers from a prayer book. Some bible stories are pretty frightening for children,and at their tender ages,wouldn't have been suitable. Imagine growing up in a family where the " devil " is quoted on many an occasion ?
As for June having been suitable to adopt,,perhaps all was indeed well at the time,,as she saw others with babies and her yearning must have been there,,but nobody can predict how someone is going to turn out. Anyone can suffer a breakdown at sometime in their lives,,but as the years went by,June found herself back at the clinic for more ECT therapy in 1982,was it ? Which could only have been brought on by Sheila and the way life was going for her.
Jeremy on the other hand didn't take too much notice of the goings-on as he would be more embroiled in his love life to worry too much of what was happening,plus,he'd gone to live at Goldhanger,out of the way. He also had the same attitude as others would have had at his age about his family,,which was normal and not an indication that he was about to do them harm.
Yes,,his birth father has forgotten that Jeremy is indeed his son whether he likes it or not. What a pity that Jeremys' other brother and sister didn't get to know Jeremy.It would have made a big difference,,even if only out of curiosity.