Office workers are seen in the London Place business district near Tower Bridge in central London February 9, 2011. REUTERS/Toby MelvilleBy John Mackie

Feb. 10 (Westlaw Business) The blockbuster merger bridging the London and Toronto Stock Exchanges may have been announced, but this London bridge may yet fall under the sheer weight of staggering legal complexity. A broad group, from AIM to Borse Dubai, and from the Montreal Exchange to Borsa Italiana, stand to be impacted by these issues. And what a set of issues it is, ranging from post-Potash foreign investment concerns to restrictive provincial securities laws to undertakings regarding corporate governance. Even legacy contractual commitments from past acquisitions by the TSX must be considered. Global markets affecting everything from equities to derivatives to venture funding await.