By Chris Dorrell New figures are expected to show that the economy returned to growth in August, but surveys suggest businesses are still taking a cautious approach ahead of the budget. City economists expect figures published on Friday to confirm that the UK grew 0.2 per cent in August, having been stagnant for the two months prior. The expansion is likely to be driven by the UK’s dominant services sector, particularly in consumer-facing sectors, which will offset continued problems in manufacturing. Construction activity may see a small improvement, largely thanks to August’s dry weather. An…