(Reuters) - UK shares rebounded after two sessions of losses on Tuesday, as investors awaited signals from two of the world's big central banks on their concern over the coronavirus outbreak amid hopes that the number of reported new cases was slowing.The FTSE 100 added 1%, helped by an 11% surge in travel company TUI after it said strong demand for holidays would help offset a hit from the Boeing 737 MAX aircraft groundings on its annual profit.If that held for the rest of the day, it would..