Most countries now permit commercial SEIFR, with inevitable restrictions.
Here in Europe, however, it's still firmly prohibited, obviously including the CAA. There's a fairly healthy debate going on about whether it should be permitted in JAA countries with rather inevitably the "yes" camp clustered around Pilatus and the "no" camp clustered around Britten-Norman. Frankly, it'll happen here in Europe within not many years, subject to probably much the same operating rules as currently apply to FAA / CASA / CAANZ operators.
I suspect that this applies only to FW mind you, it will probably be much longer, if ever, before RW SEIFR becomes acceptable.
Is it a good thing? Well, if I gave my view on that, you'd know whether I work for BNG or Pilatus. It seems largely to depend upon how you read the stats.
G