** Airtel Africa AAF.L soars over 17% to an all-time high, after parent Bharti Airtel BRTI.NS flags plans to review its subsidiary shareholding structure
** Bharti's board meets May 13 to weigh options including a possible consolidation or acquisition of stakes in subsidiaries, including Airtel Africa
** Proposed move could be executed via equity issuance, cash or a combination, according to a Sunday filing
** Stock is top gainer on the FTSE 100 .FTSE
** On Friday, Airtel delayed the planned IPO of its mobile money business to H2 and forecast a near-term margin squeeze
** India's Bharti Airtel owns a majority stake in Airtel Africa via subsidiary Airtel Africa Mauritius Ltd
(Reporting by Danilo Masoni)
((Danilo.Masoni@tr.com; Reuters Messaging: danilo.masoni.thomsonreuters.com@reuters.net/))