the grandmother story explained

so i received requests to explain in more detail this family story. i will try but it is difficult, as the only people left around are my father, who has very few memories, and this lady who has appeared, but is very elderly and batty.
what is clear is that i come from very, very humble origins. according to the documents, both of my biological great grandfathers were journeymen, which is to say a day worker who got day wages. these guys lived hand to moth doing low level jobs. there families lived in appauling conditions, all the children slept in one bed, rats bit their ankles and disease and fire were common. according to Iain, the urban life expectancy for men at the turn of the century was around 37, and that was certainly true in a working class enviornment , such as the one i obviously desend from.
it appears my biological grandparents had a shot gun wedding. the wedding papers indicate it was an "irregular" wedding. furthermore, my father was born only 4 months after the wedding, so that implies that the whole thing was an attempt to maintain the minimum of respectabilty.
my mother even doubts that the man who married my grandmother was actually my grandfather, especially as my dad looks absolutely nothing like his siblings. also, according to my dads memories, he spent most of his early childhood with his mothers parents at their house. he has very few memories of his parents house at all. he doesnt know why he spent so much time with his grandparents and hjis other siblings did not. it appears to have been some family conspiracy, but we dont know exactly why.
the second world war started on 1 september 1939. Glasgow was britain's second city, and it was anticipated that it would be bombed (it was, quite heavily in fact) so my father was evacuated with his school on 1 october of the same year. he doesnt remember much except that it was explained he was going on an "adventure" and was given a gas mask, biscuits, and an ID tag to wear across his neck. he was told that he would be returned "as soon as possible." he was the oldest child in the family, and the only one of school age, hence the only one to be evacuated. the children were taken by train to the far north of the country. he says periodically the train would stop at rural villages and local families would select some children to take in. many of these families were sheep tending or farming families, so of course they wanted the older children, especially strong looking boys. after the war, it became clear that many of these children were used as cheap labour by the families that took them in, but my father was too young to have been of any agricultural use, so he was taken in by the local school headmaster of a small village up in the mountains.
he wasnt returned to his real parents and his real parents never once wrote to him.
so until his majority, he lived up in the mountains with a strict school teacher and his wife (the only other the school teacher in the town). his adopted parents were respected people in the village, as they were the most educated, and he was a first world war survivor, with medals (over 25% of the country's men died in that war, so those who survived got respect automatically.)this couple had no children of their own so they raised my father like their own son, and made sure he got an education, and eventually he won a scholarship to go off to study in the Soviet Union. but we never found out what happened to the real family. my dad probably has 3 siblings outthere somewhere, but i suppose we will never know what happened to them, or why my grandmother never reclaimed my dad. a mystery it remains.