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
A teenage boy has been stabbed to death in London, the second fatal attack within two days.
A British amateur sailor died this morning after being hit by a sail while taking part in the Clipper Round The World Yacht Race.
Plans for seven-day GP services are "unrealistic" because of a shortage of doctors, the Government has been warned.