If punting customers were confused to be chauffeured down the river by a lost astronaut or a man dressed as an apple, it was all in a good cause. Fancy Dress on the River day earlier this month saw punting company employees in a wild array of outfits to raise money for Cambridge homelessness charity Jimmy’s. It was the brainchild of Kieran O’Brien, general manager of Cambridge Punt Company. He said: “I thought it would be a good cause for us to give back to the city we work in. We’re a big industry and I think we can do more charity work as a whole. “I chose Jimmy’s because it was a local char…