@Walter Hinteler,
Another aside: fishing, which represents 0.05% of the economy (and the UK imports almost twice as much fish as it exports, with the top five being cod, tuna, prawns, salmon and haddock), is the only UK industry to merit its own sections in the Brexit agreements that Britain has negotiated with Brussels.
But similar to Gibraltar, it's still an unsolved (kind of, at least) problem.