The prices of goods sold in the retail industry rose by 1.8% compared with July 2012, the Office for National Statistics said.
This was mainly due to increases in the prices of goods sold in the food sector.
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The Labour leader said socialist politics would not be put "back in a box" as he appeared on stage at the festival.
There are reports that at least some MPs and Lords have been left unable to access their emails as a result of the attack.
Cuillin, six, and four-year-old Lejla designed the memorial plaque to their mum that has been installed in the Commons chamber.