MADRID (Reuters) - The chairman of Spain's Telefonica (>> Telefonica SA) has said the company is seeking a "global alliance" with Britain's BT (>> BT Group plc) with cash and shares in exchange for Telefonica unit O2, a spokesman for Telefonica confirmed on Friday.

The spokesman was confirming comments made by Cesar Alierta in London, reported by newspaper Expansion, in which he spoke of global synergies between the two groups.

(Reporting By Robert Hetz; Editing by Elisabeth O'Leary; Editing by Sonya Dowsett)

Stocks treated in this article : Telefonica SA, Hutchison Whampoa Limited, BT Group plc