TORONTO and LONDON – Labour leaders and Bell Canada debenture holders are finding they share a common cause: They oppose the sale of Bell Canada. Granted, their reasons for their opposition are at opposite ends of the spectrum, but it could make for an interesting shareholders meeting come September 21, where shareholders are expected to accept the Ontario Teachers Pension Plan-led deal to take the massive telco private.Wednesday, Bell Canada debenture holders announced they had formed ad hoc committees "in response to prejudice from proposed reorganization," reads the press release. "The ad hoc committees of holders of Bell Canada debentures...