I don't know if this TV show is just local or what. It's called Bristol Airort and is very much like the other airport shows that have been on. The other night they featured people bringing in more than they should and it was interesting to note what the customs folks looked for.
First off, they tune in to times when such planes would be arriving. Tenerife was definitely targeted because Spain is not an EU country and a lot of folks don't know that, and cigarrettes are especially cheap on the Canaries.
So, Tenerife plane comes in, Customs comes to attention. You might as well give the game up if you have tried to bring in more. And they will take it all, not just leave you your allowance. They know people do it, so you might as well just throw your hands up and say "ya got me".
Oh, and lil ole Bristol Airport has a sniffing dog...doing his duty on the conveyor belt between plane and baggage claim. You don't even see the little critter.
So, what can you do? My guess is that you personally should not smell like cigarrettes. If I were an agent, I'd probably be secretly trying to suss out folks who do smoke. Next, I'd wait. Stall. Don't come out with others, but wait until a big plane-load comes through from someplace where cigs wouldn't be brought in from.
Oh, not that I have experience.
I don't smoke and maybe have only once brought in a single bottle of liquor...and I still have it after years. Duty free isn't really my interest. Just that when I was watching the Bristol Airport show a few thoughts come up. Hmmm...if I wanted to... (LOL.)