By Chris Dorrell The UK’s all-important services sector lost some momentum in March but its strong start to the year remained broadly intact, according to a closely watched survey. S&P’s purchasing managers’ index (PMI) for the services sector registered 53.1 in March, down from 53.8 in February and below the earlier 53.4 ‘flash’ estimate. Although the survey suggested momentum in the services sector was slowing, it still remained comfortably above the 50 no-change mark. Firms in the service sector noted that economic conditions were slowly improving, but flagged household incomes remained con…