I find it hard to believe degrees weren’t necessary for teaching. Do you mean Primary or Secondary?
@MuffinStrops, I went to Teacher Training College in the 70s. I was studying 4 A levels (if you count General Studies) but I don’t think I I had to pass them to get in.
The standard offering was a 3 year course, aiming to teach Primary, Middle School or Secondary. We studied Education and two academic subjects, one for three years (Main) and one for only two (Subsidiary). If you wanted to, and qualified, you could stay for another year to do a BEd. Not every college offered the BEd, and some offered only Pass degrees, not Honours ones.
Of 11 of us doing my subject, 8 applied for the BEd, 4 were accepted and 2 passed. So, 11 left as qualified teachers, only 2 of whom had degrees.
I left college after 3 years and worked in a private secondary and later a state comprehensive teaching Maths, which had been my subsidiary subject at college.