By Izzy Hawksworth & Joe Smith A beloved moggy called Oscar gave his owners the shock of their lives after he turned up alive and well, almost four years after he vanished in a snowstorm. Distraught owner Katie Salt, 39, says she spent weeks searching for her furry friend, the 12-year-old black and white cat, but Oscar never returned home after the unexpected heavy snow in 2020. Katie described how, after putting up missing posters, searching the streets for weeks and appealing for information on social media, she gave up the search – convinced Oscar had died during the snowstorm. But then Kat…