There are very few species of venomous spiders in Europe, and the most dangerous, the Mediterranean black widow, is, as its name clues, confined to the southern regions. So are the european recluse spiders (which are far less dangerous than their American or Australian counterparts anyway). Some other venomous spiders have a more cosmopolite distribution, but they're often not agressive and their bite only rarely require medical attention (generally in case of allergy or if it becomes affected).
So yeah, "spider bite" is virtually a non-concern in northern Europe (like, it doesn't *never* happen that someone needs to go to the hospital for a spider bite, but it's so rare as to be considered anecdotical).
