Richard and Philip's relationship really began after Richard was forced to leave school at 16 to support his family by getting a job.
Philip, who had taught Richard at school, decided to step in.
"[Philip] was able, as a result of several key figures in Port Talbot... to get Richard back into school, which is a pretty unusual thing to return to school when you've left," said Angela.
With conditions somewhat cramped at his sister's home, Richard moved into the house of Ma Smith, where Philip was a lodger.
"And then from that point Richard was being trained, in effect daily, by Philip," said Angela.
Philip became Richard's legal ward, taking full responsibility for him, and then Richard Jenkins changed his name to Richard Burton.
"That happened for several reasons," explained Angela.
"It's an awful thing to say these days, but [Richard] would be in a better position to have a name like Burton, which was seen less as a sort of working-class Welsh name.
"Also, in effect Philip was taking responsibility for Richard and was already a well-respected person in the theatre world himself, so it gave Richard again a further opportunity."