Food inflation: Rising chocolate and butter prices drive up rates

The rising cost of chocolate, butter and eggs has helped drive food price inflation to its highest in 18 months, a survey says.Food inflation hit 4.2% this month, compared with 4% in July, according to the British Retail Consortium latest shop price monitor. It is higher than at any time since March of last year, when it was 3.7%.The figure echoes separate recent data from the Office for National Statistics,…