UKIP's second place finish in South Shields saw them claim 24.21% of the vote in the constituency, having not contested the seat in the last General Election.
By contrast, the vote of all three main parties fell - though only moderately for Labour.
The Conservatives saw their vote drop by 10.04%, down to 11.55% overall, while the Liberal Democrats - who finished third in 2010 - tumbled 12.79% to just 1.42% of the vote.
Newly-installed MP Emma Lewell-Buck claimed 50.51% of the constituency's vote, a drop of 1.51% from the vote share commanded by her predecessor David Miliband.
More top news
Patchy rain affects northern areas of the UK in the next 24 hours. Elsewhere, dry but rather cloudy.
Marjorie and Micheal Cawdery, both 83, were found dead in their house in Portadown, Northern Ireland on Friday.
Ann Myatt, who is contesting Jo Cox's former seat, told a hustings: "We've not yet shot anybody so that's wonderful."