I did wonder quite why Screen Australia had invested in a documentary about making porridge in the Scottish Highlands, but then we are introduced to a Sydney resident who like people from Canada, England, Holland and even Zimbabwe has travelled to the village of Carrbridge in the Cairngorms and it becomes a bit clearer. It’s here that every year for the last thirty, Charlie Miller has organised the World Porridge Making Championships. He has long retired from his professional career and now augments the funds of his organisation by turning the odd spurtle - including a golden one which is…