1 hour ago, Tropicalsenior said:I had a hunch that it was probably Danish because I had seen canned a lot of Danish bacon in the supermarkets in the US about that time. If I remember right, didn't the UK have an epidemic of disease about that time that just about wiped out the pigs in Britain.
I don't recall any outbreak of disease among pigs in the 1960s, nor can I find anything online referring to that. Perhaps you are thinking of so-called "mad cow" disease, but that was 1980s and as the name suggests affected mainly cattle, but also 177 people died. Later, in the early 2000s, there was an outbreak of foot and mouth disease, but that affected mostly cattle and sheep, although some pigs were involved..
The two largest suppliers of canned bacon seem to have been Yoder's (Ohio - based) and Plumrose (Chicago based, but now owned by JBS in Brazil, who acquired the company in 2017.)
Danish bacon was certainly sold in the UK in the 1960s, but no one I have spoken to recalls canned Danish bacon.