© @Copyright HELLO! Hello! Magazine We were looking forward to seeing one of Britain's Got Talent's most famous winners, Susan Boyle, return to the show for the Christmas special, however, the star is sadly no longer able to appear due to COVID-19 restrictions. MORE: David Walliams' ex-wife shares incredibly rare photo of their son, AlfredSusan's representative told Metro: "Susan, unfortunately, couldn't appear on Britain's Got Talent as her area in Scotland was in a Tier 4 category at the