Last time I checked, mtgox wasn't licensed with the FSA (or any other similar body for the matter)
And I doubt that GLBSE would be subject to any kind of securities-related laws, at least not before bitcoin gets defined as money.
I would assume that the mtgox account got closed (I doubt it's actually 'suspended') because they're having the same problem as with the CIC in France. Probably the equivalent in the UK of the "unlicensed banking business" charges they had to face in France.
They're lucky that their Polish bank doesn't seem to care.