Brussels, 20/12/2000 (Agence Europe) - The European Commission has authorised Vodafone to increase its stake in Airtel, the Spanish mobile phone operator that it holds jointly with British Telecom (BT). After this operation, it will jointly control its subsidiary with its partner BT. The joint venture had first been authorised on 8 June 1998. At the time, it was jointly controlled by BT, Airtouch International (which has since become Vodafone Airtouch Plc) and the Spanish company Grupo...