Film director Duncan Jones wrote on Twitter: "Tony was a truly lovely man who took me under his wing & ignited my passion to make films."
He added: "Awww Tony. Wish you had felt there was a way to keep going. What a sad waste. My thoughts go out to his wife and beautiful children."
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Nigel Farage's former deputy Mr Nuttall says he's the only candidate who can rebuild and unify the party.
The 27-year-old was stabbed in Arthur's Hill, Newcastle on Monday and later died in hospital.
Newcastle get three points from the match and now three points clear at the top.