Not yet!

 Thank you for all the input yesterday, it's good to know everybody's thoughts, helps me to crystallise things in my own mind.

I should say that I'm not buying an air fryer right now - my intention yesterday was purely to go and have a look at the dual basket ones, to see how big they are and how much space they'll take up.  We're not intending to sell our present cooker right now either - we'll most likely leave it here if and when we move, asking for a contribution from the landlord for it.  Oh, and any new place won't have any white goods, it's not the policy of our local housing dept to leave any in the properties when the tenants leave (or die!)...I guess they'd have to pay to have them tested for safety and any defects.  Kim, you also mentioned this in comments, thank you.  The housing dept don't supply any either, tenants are expected to provide their own.  I'm assuming that any kitchen will have a space where a full size cooker would go....we'll most likely put in a cupboard base unit of some kind, or perhaps a wooden freestanding small island type thing, with a wooden top, on which to stand the air fryer.  We have a small base unit in the caravan which the mini oven stands on, we bought it from one of the DIY stores, we'll get something similar I expect.  

I want to do more research before I decide definitely to get one, and then google to find where I can get my chosen model (whichever that may be) for the best price.  I also want to go and physically look at more, the electrical store we went to yesterday only had one or two of the dual basket models on display.

I don't use my oven nowadays nearly as much as I used to and, when I do use it, I try to make sure I use all the available space in it, to make the best use of the electricity cost.  E.g., last night we had fish and chips (freezer to oven), but I also did a trayful of roasted root veggies - we like them cold with mayo as a salad lunch with some grated cheese, or frozen to quickly reheat in the microwave.  If I'm putting a dinner in the oven, I frequently bake a tray of jacket spuds, or a cake, some scones or sausage rolls or a quiche at the same time.  But as I said, the oven is so low down and that makes it difficult for me to get stuff in and out of the oven.  I do ask husband sometimes to get things out of the oven for me, but with his balance issues, shaky hands and general clumsiness, it's not ideal.  He fell into the lounge door frame again yesterday, making the door bang against the wall and frightening me half to death again (I was in a different room so just heard the bang).  I think we're going to have to go back to the GP, his balance problems, clumsiness and short-term memory problems aren't getting any better - worse if anything, I'd have thought they should be wearing off by now if they were merely side effects of his new medications.  It is worrying me a bit.