(Telecompaper) Airtel announced that its unit Airtel Africa plans to raise gross proceeds of USD 750 million through its listing on the main market of the London Stock Exchange. In a statement, the operator confirmed it was going ahead with the listing and would freely float at least 25 percent of shares in Airtel Africa, with a further 15 percent of shares made available under an overallotment option. Airtel Africa is also considering a listing of its shares on the Nigerian Stock Exchange.