The subject of the TLC show “The World’s Fattest Man” is fleeing the US for Britain — for an estimated $137,000 in free health care. Paul Mason, who weighed almost 1,000 pounds before having gastric band surgery in 2009, has been almost constantly hospitalized in Athol, Massachusetts, after starting to regain weight after a bad breakup. Enlarge ImagePaul Mason Facebook He feared being crippled financially by US medical costs — so is instead moving back to his native Britain this week to get the work covered for free by the National Health Service. “We all fall apart when things get...