By Chris Dorrell Business confidence slipped marginally in February, but overall confidence remains robust supporting the view the UK economy has passed the worst. Despite falling into a shallow recession in the second half of last year, business surveys have pointed to an upturn at the beginning of the year. Lloyds Business Barometer, which measures business confidence, remained well above historical levels in February despite falling slightly compared to January. Overall firm confidence, which combines firms’ expectations for the economy as a whole as well as their own trading prospects, fel…