By Nathan Pynn & Rom Preston-Ellis Golfers at England’s oldest coastal course are feeling under par – after the 5th hole started crumbling into the sea. Members of Alnmouth Village Golf Club fear the historic nine-hole course could soon disappear completely unless urgent action is taken. Pictures taken at the weekend show large chunks of rough on the edge of the 5th green collapsing onto the beach. The 155-year-old club in Northumberland is the oldest nine-hole links course in England. But recent storms and flooding have caused the course which lies next to Alnmouth beach to erode onto the san…