By Chris Dorrell Growth looks set to slow in the UK economy, according to a closely watched survey, as businesses await the October budget with a degree of caution. The latest ‘flash’ purchasing managers’ index (PMI) came in at 52.9, down from last month’s figure of 53.8 and comfortably below expectations. It was the lowest reading for two months. Nevertheless, the figure was comfortably above the 50 no-change mark and extended the run of expansion to 11 consecutive months. The survey showed slower growth in both the services and the manufacturing sector, though both remained in expansionary t…