Dane, there is an oft-circulated alphabetic list of the various European countries, that was assembled many years ago. I think someone in England compiled it. I don't have the web-link handy, but perhaps someone can link it here.
Basically, when you read down that list, it's downright discouraging for perhaps all but England. Either outright "no's", or ..... riddled with discouraging things. But...... what's odd is, in most all those countries, there's no shortage of md'rs. And even the major dealers (Whites, Garrett, Fisher, etc...) will often have dealers in those countries (who presumably sell them to people who ... you would think .... are going to use them, eh?

)
One time, I had a used detector listed on a web-classified sale, and it sold to a fellow in Spain, who had agreed to pay for the over-seas shipping. My curiousity got the better of me, because Spain was one of the "discouraging" locations on this list of European laws. So .... I couldn't help myself, and ... like you .... asked the guy "
I thought detecting was illegal there?". He replied back that .... for starters .... answers given on a list like that (where someone merely writes a letter to bureaucrats asking "what are your laws?") apply only to federal lands. Ie.: not city, county, etc... (or whatever they call the sub-categories of land-ownership of land in those countries). And, for example, you could hunt on private farmers land, with permission, till you're blue in the face (since the laws applied to public land, not private land). Or quite frankly, the buyer told me, they hunt so far back in the woods, there's no one to care or complain, to begin with.
I mean, the answer you might get from some USA bureaucrats would be the same too "no". Because perhaps they're couching it in terms of federal lands here (Shiloh, ghettysburg, Mel Fisher legal hassles, etc....) Yet we all know you can detect here, so long as you steer clear of obvious historical landmarks.
Many people have taken those web lists at face value. They leave their detectors at home when they go vacation in those countries. Imagine their surprise when they arrive and see other md'rs at their beach resort, and no one pays them any mind? It's probably one of those things where "no one cares, TILL you ask".