James Arthur beat Jahmene Douglas to take the title in front of a 10,000-strong audience at Manchester Arena, with millions more watching the ITV show live on television.
Arthur looked stunned as host Dermot O'Leary announced the result and could only say "wow" when asked how he felt.
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It comes after the leader of Windsor and Maidenhead Borough Council called for rough sleepers to be cleared before the royal wedding in May.
One has died. The RSPCA is appealing for information.
Ukip's ruling committee unanimously backed a vote of no confidence in Mr Bolton on Sunday and six key party figures have also resigned.