last October I had a weather diversion into Brussels international in a light twin.
Excuse my skepticism, but was there really nothing else available? EBLG EBOS EBCI EBAW EHEH LFQQ EHRD must all be within 50 NM - or was it 60 - and all have a certain degree of IFR facilities. But not all operate 7/24, admittedly.
Then again, ISTR some argument about a G/A handling monopoly being a violation of some EU ruling. Not sure you couldn't fight back on that, even now.