RBS tipped back into loss by NatWest Markets, mis-selling hit

LONDON (Reuters) - Royal Bank of Scotland highlighted the challenges facing its new chief executive Alison Rose on Thursday as a weak performance at its investment bank NatWest Markets and yet another mis-selling charge tipped it into a third-quarter loss.Shares in RBS were down 2.4% at 0820 GMT after the state-backed bank reported an 8 million pound pre-tax loss in the three months to end-September, compared to a 961 million pound profit for the same period last year.Rose is due to head a..