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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The RMT Union's comments come as it's announced a new operator will takeover the South West Trains franchise.
Monday's forecast for the west of the region
Monday's forecast for the east of the region