OK, I have a solution! Ignore selecting the CW/CE option. Search you Region/Country in Eeekonomy. When you get the hotel listings, use the top bar to change Class, and anything else you need. It then works OK.

I haven’t gone to Payment/Deposit yet, but hope to do that over the next day or so. Black Friday sale offers are so meagre I’m not bothering about the sale ending! YMMV.