As an aside, my latest Parcelforce delivery driver tells me that everything is being stopped currently at customs and charged duties. I know we've been hit on all kinds of items small and large. Just a thought.
I had a delivery from overseas this mornig via Parcel Force, no charges added at all, came straight through, but i was told a little while ago by my Postmann that thihgs with typed address labels were more prone to get stopped, especially if they were from a business, the one i received this morning, although from a business, had a hand written label and no problems encountered.
No worries on the pocket stove, i know a few guys over here and quite a few in the US who use them and none of them have said they have had problems, ive certainly not encountered any, not saying they haven't mind, just if they have, they have not said anything, it's horses for courses, what suits one wont suit another, i bought a 2nd hand Honey Stove and then sold it as i didn't get on with it and went back to my SAT, Folding stove & occasional use of my Ikea Hobo set up, sure they are heavier and bulkier, but i dont have an issue with that.