Microsoft will on Wednesday lodge a formal appeal against British regulators’ decision to block its $75bn takeover of Activision Blizzard, the Call of Duty maker. Sky News understands that the technology behemoth will file its complaint with the Competition Appeal Tribunal (CAT) within hours, sparking the next phase of its fight to secure one of the world's biggest takeover deals for years. Microsoft's decision to challenge the Competition and Markets Authority's (CMA) ruling on the Activision Blizzard transaction has been widely expected. The takeover has been approved in other key jurisdictions, including in the European Union and China, and the…