A Heacham man’s music-themed 81st birthday party has helped raise hundreds for two good causes. John Harris hosted his second consecutive piano party at Heacham Methodist Chapel on Saturday – which gathered £600 to be divided equally between Diabetes UK and the Alzheimer’s Society. Around 70 people attended – including guest of honour West Norfolk mayor Margaret Wilkinson – over the six hours of the event, some of whom played instruments, sang and recited poetry. “I was not only amazed but really truly very grateful and touched by people’s generosity,” John said. “It was a superb birthday. Tha…