Star Fireworks was crowned 'Champion of Champions' at the British Firework Champions on Plymouth Hoe on Wednesday night.
The Berkshire company beat Pendragon Fireworks into second place and Selstar came third.
Six companies entered this year's two-day spectacular spread over Tuesday and Wednesday evenings.
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The major party leaders' campaigns for the General Election will remain suspended on Wednesday following the Manchester terror attack.
The threat level has been raised to critical by MI5's Counter-Terrorism Analysis Centre.
Prime Minister Theresa May announced the decision from Downing Street.