Hiya
I would think that you are wrong in what you say - 200 cigarettes is 200 cigarettes no matter how they are packaged. I regularly go to the Canaries and when I return through UK customs with as many as I can get in my suitcase, I go through the Blue "EU" Channel. The only time I did not do this was when there were quite a few customs officers around and we were the only flight in baggage reclaim, went through the green channel and got pulled over and when they found 800 I played dumb and said "but I have come from Spain" - in theory you are not lying. They let me keep them but told me not to do it again. The worst they will do is seize them, which I think is worth the risk at the price you are paying in the Canaries! Good Luck!