Ahh, you brits miss the landlink!
Here in Holland we of course also killed everything bigger than squirrel, but fortunately we are connected to more rugged areas in Belgium and Germany. Al lot of species introduced them selves again, some with a little help. Lots of wild boar now, all kinds of flying creatures and since an few years we again have otters and beaver.
There where plans to re-introduce bigger and wilder animals but people are a bit scared. They now use Scottish Galloways as big grazers in some habitats, they look wild at least.
Since very recent Germany has wolves again! Conservationist where lobbying for years to no avail, but these seem to be illegal immigrants from Poland! And they are spreading as there are no more borders and lots of wolf-empty space! So maybe in 10 or 20 years we also have wolfs again in Holland (but its probably to crowded here).
Oh, a few months ago there was a kangaroo seen in the east, but I dont think that we can count that as being wildlife.