Grannyactivist, that's exactly what I have. But it is quite easy to improvise a kettle style BBQ to use as a smoker. You need a heat source, charcoal, a tin tray directly on top of the charcoal. You put a good handful of damp wood chippings (oak, fruit wood, hickory etc.) on the tray, then the fish, meat etc on a rack above the tray. Close the lid and allow to smoke for about 30 min.
With fish, before you smoke it, you need to brine it. If anyone wants to know more i can point you to a good website.
Artygran, yes, you are right, coarse fish, mainly carp are eaten in Eastern Europe, and fishing there appears to be free to all. Some Eastern Europeans are raiding out fisheries for free food, which has been a big problem in some areas.
Pike is about the only coarse fish normally eaten in the UK, but not that much, cod tastes much better.