The fisherman was hoping to catch a 10lbs brown trout using a maggot as bait when he hooked into the monster from the deep, which weighed a mighty 34lbs 12ozs. The catch beat the previous British record for a rainbow trout of 33lbs 4ozs that has been held for more than a decade since 2003. Mr Mitchell, from Coatbridge, Lanarkshire, caught the silver giant during a trip to Loch Earn, Perthshire, which is stocked with tens of thousands of brown trout.