Tesco is embarking on a fresh round of aggressive cost-cutting in its UK supermarket business that could eliminate thousands of jobs and its in-store deli counters. The latest plan reportedly involves the closure of meat, fish and delicatessen counters as well as downgrading in-store bakeries. Staff canteens are also to be replaced with vending machines, according to the Mail on Sunday, with suggestions of up to 15,000 jobs at risk. The cuts are part of a plan to slash £1.5bn…