I never had a changing mat, didn`t even know they existed, I changed all mine on my knee. We didn`t even have hot water or an inside toilet in our first house, so definitely no washing machine. We did buy a Baby Burco just after baby number one was born, but had a catastrophe and it burnt out, so never bothered again until we moved into our new house in late 1965, and we had a small Hoover washing machine and a separate spin dryer.
When my 3rd daughter ws born in 1967, it was New Year`s Day. There were 4 babies born in that hospital on that day, our local paper came to take my photo with the baby, the Manchester Evening News wrote a paragraph, no photo, then the Bolton Evening News wanted all the mothers with their babies for a photo, but there were only 3 of us on it. When we asked why, we were told it was because the other girl wasn`t married!
As several people have said, babies were put outside in their prams, never a thought of them being kidnapped or harmed in any way. Likewise as to leaving them outside shops, although I did leave baby 4 outside the shop and went home without him on one occasion. Luckily, it was just round the corner, and Mrs. Barton, the shopkeeper, said, "We`ve been watching him, wondering how long before you`d notice!"