By Aby Jose Koilparambil (Reuters) -British bus and rail operator StageCoach on Wednesday backed a 594.9 million pound ($780 million) takeover offer from a European infrastructure fund that trumps a bid by rival National Express. StageCoach said it was no longer recommending National Express’ 445 million pound offer as it had agreed to an offer from Inframobility UK Bidco Ltd. Inframobility is owned by Pan-European Infrastructure III, which is in turn managed and advised by infrastructure investment manager DWS Infrastructure. StageCoach shares closed 37.2% higher at around 104.4 pence, almost…