If you'd like to witness the Premier League of European organized crime in one package, you could take a trip to the Costa Del Sol. It's a major tourist hotspot, but if you do a bit of digging in the underground you'll come across blokes most people wouldn't even see in their worst nightmare. And they don't even try to hide. If you're an expat, you're regularly offered to do work for a quick buck. If you decline, it's rare that you keep on getting harassed and they'll mostly don't elaborate any further and just leave you alone. If you accept, you're already knee-deep in and things mostly end up with either you in jail or with your charred remains ending up in the trunk of a burned-out car. I know someone who stayed in that region for some time, didn't get involved in any crime himself, but he encountered and/or heard stories about nutcases from all-over Europe.
Italian OC is definitely there, with the Sicilian mafia, Ndrangheta, Camorra...all having connected people hiding in the region. They mostly lay low.
British and Irish OC is among the most "visible". There's English groups from Liverpool, the London-Essex-Kent area, Nottingham...Scottish groups from the Glasgow area...Irish groups from Dublin as well as some from the Traveller community... By far the most violence going on in the region is associated with the crime firms from these places.
OC from the FSU is active there as well. Russians, Russian-Israelis, Georgians, Armenians, Chechens, Azeris...they launder a shitload of money over there. They don't make a lot of noise like some of the Western European criminals do over there, but there's fears of increasing violence associated especially with the Georgian and Armenian groups.
Balkan OC is there. Serbian/Montenegrin clans have activity, as do the Albanians. When it comes to their groups, things have not yet spiraled into violence, but it's always tough to say what the future brings with these groups.
OC from the Netherlands is active there and lots of it. This goes from the traditional "penoze" from North Holland to the Traveller ("Kamper") milieu from North Brabant to the gangs of Moroccan or Antillean origin from the Randstad. Next to the British and Irish groups, the groups from the Netherlands are probably connected to most of the gangland killings.
France-based OC is there and is increasing. Algerian gangs from Marseille, Seine-Saint-Denis, Grenoble, Montpellier...the Traveller ("Gens du Voyage") milieu from Montreuil, Etang de Berre...as well as the Corsicans all have property there. Violence isn't as high as the other groups from Western Europe, but it does happen.
Groups from Sweden have shown up. They're mostly Moroccan in origin from the Malmo area and they mostly have connections to their counterparts in the Netherlands. Assyrians from the Stockholm area are active there as well.
As with Sweden, the groups from Denmark are also mostly Moroccan in origin.
Turkish groups from the Black Sea region as well as Turkish-Kurdish ones from Southeast Anatolia have property there. Some of the Turkish criminals can also hold British, Dutch, German and Belgian passports. They lay reasonably low, which is surprising seeing two major clans from the Black Sea region have a huge conflict which has claimed casualties all over Europe.
From Belgium it seems to be largely groups from the Antwerp area. Largely Moroccan in origin.
Groups from Germany have increasing activity. Mostly they're Turkish, Kurdish or Lebanese in origin.
Bulgarians and to some extent Romanians are in the area. Unlike the other groups, they don't launder a ton of money over there and mostly keep to pimping.
