Never been charged for an inflation kit before. My 2015 Grand Picasso was the first car I had with out a spare wheel, no inflation kit on collection, I went back to the dealer and they gave me one out of a huge box full of them, I guess they just forgot to put one in.
Every other car after that has had one, used them too – and Kwik Fit will give you a free replacement goo canister via Motability – worth remembering as they are a few quid otherwise.
I have my own small portable tyre repair kits, a remnant of my motorcycling days, both screw in plugs and the worm type tyre plug kit – used both over the years during motorcycle trips and they work very well (perhaps not so well on cars without a jack!)
In life, it's not who you know that's important, it's how your wife found out.