Update: Well, it seems someone at Google was a bit confused, as LTE has been added back to the European specification of the new Nexus 7, including band 20. Crisis averted.
The last generation of Nexus devices was stuck with HSPA+ mobile data, but with the new N7 Google has stepped into the 4G world. However, it seems like that world may be smaller than we previously thought. The specification page for the Nexus 7 has been tweaked to remove LTE bands from the European version, leaving it with only HSPA+.