By Amber Murray Key future indicators of consumer confidence all sharply fell in September as Brits nervously awaited policy announcements in the Autumn Budget, according to fresh data. GfK’s long-running consumer confidence index fell sharply to -20 in September overall, with all measures – including personal finances, economy and purchase intentions – down month-on-month. “Headline consumer confidence has… taken us back to a similar level seen at the beginning of this year,” Neil Bellamy, consumer insights director at GfK, said. “Despite stable inflation and the prospect of further cuts in t…