H/T Law Firm Risk Management Blog
"... from Bill Frievogel comes another Canadian pro-ethical screening/information barrier decision: Province of Ontario v. Chartis Ins. Co. of Canada, 2014 ONSC 4221 (Ont. Super. Ct. July 16, 2014) --
"We are simplifying the history somewhat, but the essentials for this audience are this: Lawyer worked at Firm A to some considerable extent on cases for the Province against InsCo. Lawyer wound up at Firm B, which is representing InsCo against the Province in those same cases. Firm B erected in advance a screen essentially in compliance with ethics rules of the Law Society of Upper Canada. Nevertheless, the Province moved to disqualify Firm B. In this opinion the court denied the motion, finding that the screen was satisfactory. Excellent discussion of the judicial history of screening in Canada."