But back to doing laundry:
Several people have suggested using laundry sheets.
I had to look up what they are; they sound like a cool solution but then I found this:
"PVA is woven into laundry sheets to keep them intact. "
https://www.blueland.com/articles/are-laundry-pods-and-sheets-plastic
I'll stick to liquid soap.
But now I will also try the liquid laundry soap that my health food store sells out of a large vat with a faucet. BYO container: I can make that a glass bottle.
@CelloMomOnCars
Wow, I learned a lot from that thread. Thanks.
I use liquid for my laundry, but pods for the dishwasher. I'm not even aware of an alternative for that in UK supermarkets. Going to have to do some detective work to find out.