CK HUTCHISON HOLDINGS LIMITED 
The European Commission said it would now decide by April 18 instead of March 16 whether to clear the deal which will create the top mobile operator in Britain through the combination of Hutchison's Three and Spanish operator Telefonica's O2.
"The parties have requested a 20-day extension for the in-depth investigation," Commission spokesman Ricardo Cardoso said in an email.
The EU competition enforcer launched a full investigation into the deal last month, worried that it may lead to price hikes.
Sources said Hutchison, owned by Asia's richest man Li Ka-shing, is prepared to sell parts of the combined company's network capacity and frequencies to fend off regulatory concerns.
(Reporting by Foo Yun Chee; Editing by Elaine Hardcastle)
