By Chris Dorrell London was once again the UK’s fastest growing region, according to a new survey, helping to drive a continued uptick in business activity across the country. Natwest’s London purchasing managers’ index (PMI), a measure of activity in the private sector, rose to 57.4 in April, up from 57.1 the month before. This meant London was the UK’s fastest growing region for the eighth consecutive month. Firms reported a sharp rise in new work, with increased client activity said to have supported the latest uptick in sales. “The sharp and quicker expansion in the capital also supported …