I don't like most blunt flavors, I almost always smoke Swisher original (unflavored) or Swisher sweets, which just have a kinda mild sweet flavor to them that I think complements bud. If I have to use a flavored blunt though I prefer peach, but the flavors all strike me as kinda gross. Especially when licking the blunt, the flavor can get really overpowering and unpleasant.
So what's a blunt cutter? I looked it up just now and it looks like a little circle with a blade in it. I've never seen one here (Texas) at all. I doubt that most policemen here would recognize it.
You can totally accomplish the same thing with a pocket knife though. My pocket knife is only used as drug paraphernalia but the cops would never know.
As for bringing blunts back to Britain, it might not work out so great because blunts get stale. Stale blunts crack and break a lot easier then fresh ones and are harder to roll. Still, I've rolled plenty of nice blunts from stale wraps that I'd had for several months, so if you're good at rolling it shouldn't be much of an issue.
I have no idea what customs would think of it though.