AGL's Upstream Gas's operating EBIT increased by 463.3% to $16.9 million compared with $3.0 million for the prior corresponding period. AGL completed the acquisition of Mosaic Oil NL (Mosaic) on 20 October 2010. This has enabled AGL to develop the depleted Silver Springs and Renlim gas fields as a gas storage facility and to enter into a long-term gas storage agreement with QGC Pty Limited (a wholly owned subsidiary of British company, BG plc). Income for the half year includes an initial storage fee of $15.0 million. Income from gas storage fees is expected to be approximately $8 million to $10 million per annum over the next three years, although it is unlikely that there will be any additional fee income in the second half of this year. Total 2P gas reserves increased by 451 PJ since 30 June 2010. AGL's combined 2P gas reserves entitlement for the Moranbah Gas Project (MGP) and ATP 1103 increased by 312 PJ (41.8%) to 1,059 PJ.