"However, they will not be permitted to remain a political party without having an open membership policy and a democratic structure. That's fair enough isn't it?

Oh won't they? this sound very dictatorial to me. Are you going to be the first to sign up with the BNP and start 'making changes from within'? Because unless you are you have little or no say in the whys and wherefores of ANY politcal entity. The membership pays their dues therefore the membership has the right to make policy.