Microsoft has made a new bid to buy Call of Duty-maker Activision Blizzard in the latest twist in the tale of what would be the biggest deal of its kind in the gaming industry. Its original $69bn (£59bn) deal was blocked by UK regulators, but under the new offer Microsoft has agreed to transfer the rights to stream Activision games from the cloud to Ubisoft, a video games publisher, for 15 years. The five Brics countries - Brazil, Russia, India, China and South Africa - are holding their 15th annual summit in Johannesburg. What's on the agenda? Also, British microchip designing giant Arm has announced it has filed paperwork to sell its shares in the US. The Cambridge-based company, which designs chips for devices from smartphones to game consoles, plans to list on New York's Nasdaq in September.