Thank you KhunLA, and to NowNow for both of your posts advising me that I was being a nutter getting the 3.5l Air Fryer. I have learned my lesson, cancelled the Shopee order, and will take notice of you both, especially NowNow in future.
After all this advice and discussion, I shall stick with my cast iron skillet on the gas hob for my fish, burgers, bangers etc etc, and do my chips/wedges in a frying pan with a shallow layer of oil. All other dishes can be done in the wok.