That’s interesting – I had a flat, used the gunk and went to Kwikfit for a fix/new tyre. Got a new tyre and they gave me a new can of goop the same size as the old one, authorised by Motability. It was made by Airman, but then, that’s what I used as I had an Airman kit I’d purchased myself when my last motability flat (and oem gunk) was used. I decided to use it as it still left me with the oem set in the boot. It’s basically all the same stuff & the compressor in the Airman kit is identical to those in my last 3 cars (Citroen, Ford & Kia).
First time this sealant replacement happened to me, and it makes more sense than going back to the dealers for a non-existent product.
In life, it's not who you know that's important, it's how your wife found out.