And curiouser still, I shopped in a Co-op yesterday, spend £40. The terminal displayed both contactless & Apple Pay logos, but payment was declined... Limited to £30.
So, form observation, the rules seem to be...
In Waitrose, most terminals will only prompt for contactless payment (contactless symbol) for spends under £30, though a few display contactless for higher sums too. Regardless of spend, Waitrose terminals never display the Apple Pay symbol. But if I see the contactless symbol displayed, it seems Apple Pay will be accepted, even if far exceeding £30.
In Co-op, the terminal (sample of one) seemed to display contactless symbol, and Apple Pay symbol too, regardless of spend. But payment is rejected if over £30.
Clear as mud, then.
I did overhear the manager in a pub I frequent mention that contactless payment terminals were soon to be introduced. I wonder, how much beer can I justify buying, in interests of academic research, to explore the effect exceeding their £30 limit?