As an air traffiker let's clarify what this means.
In UK airspace the E145 and E135 will still be allowed access to RVSM airspace but will require 2,000 vertical separation from other traffic, or 5nm lateral separation.
So, depending on the traffic situation, they may still operate at levels above FL280.
It appears that only the UK CAA has acted so far so the ban applies to all UK-registered E145 / E135. European operators are still RVSM approved.
It's a crazy world !!