By katie.green@iliffepublishing.co.uk (Katie Green) A number of Sainsbury’s trolleys have been dumped in the River Witham in Grantham. Stacey Staff spotted the dumped trolleys and reported them to the nearby Sainsbury’s store in London Road. He then reported the trolleys to TrolleyWise – an app that allows people to report abandoned trolleys in their local community – but they still remain in the river as TrolleyWise will only collect them from a footpath or roadside. Stacey said: “The trolleys have been building up over the past three weeks. The trolleys in the river are unsightly and not gre…