Centrica (CNA.LN): 1H 2010 earnings Due: July 27 at 0600 GMT Dow Jones survey of three analysts Operating profit: GBP1.37B, +47% (GBP936M 1H 2009) NOTE: Centrica (CNA.LN) 1H operating profit is expected to be up on strong demand due to the cold winter, high domestic energy tariffs and low wholesale gas and electricity prices. Going forward, the recent strength in wholesale electricity prices could have a negative impact on core earnings in the second half of the year, analysts say. ([email protected]) Contact us in London: +44 207 842 9262 [email protected] (END) Dow Jones Newswires July 27, 2010 08:30 ET (12:30 GMT)