The brown's can't sell this without destroying the share...

The brown's can't sell this without destroying the share price... from everything they have said, they are not negative on TNG's prospects, just negative on the board structure/governance. If they were going to sell though, then all they can do really is use every spike in the share price to sell into, same as Ao Zhong did (and that took them years). Brown's probably average a hell of a lot less than Ao Zhong did, so that could potentially sell down towards a much lower average figure, but seriously, they are rational people. I suspect they would pursue further corporate or legal avenue's (such as the 249d) before taking that sort of action.