plunged into a freezing canal.Gregor Angus was out walking in Linlithgow, West Lothian, with his young son when they came across a lone dog without its owner on January 31.The dad approached the pooch but soon spotted 81-year-old Brian Watson floating in the bitterly cold waterway.The 39-year-old jumped in and managed to drag the stricken pensioner to safety while shouting for help.His young son Lucas held onto the dog, named Hugo, while several passersby stopped to hand over their jackets while