[orwin]

Did you mean, no single market for _financial_ services?

In that case, yes. But other kind of services do take advantage of the single market. The issue is the language barrier, so Germany, Austria benefits a bit more than other, but with non-english speakers aging out of the workforce, this is changing (we used to be mostly franco-belge, we now work with Spain, Italy and Romania. Weirdly our bad accent makes it easier to understand each others than Oxford English)