Serbia’s triumphant but untested Student List movement is preparing to start talks on forming a government capable of reversing 14 years of increasingly authoritarian nationalist rule, after a seismic weekend election win .

Supporters of the movement, which has no experience of government, took to the streets in the west Balkan country on Monday after the strongman former president, Aleksandar Vučić, was defeated in a historic landslide.

Vučić conceded defeat late on Sunday, bringing his domination of Serbian politics to an abrupt end and capping two years of anti-government protests triggered by the collapse of a canopy at the Novi Sad railway station that killed 16 people.

With 100% of ballot samples counted, projected results from the Centre for Free Elections and Democracy in Belgrade showed the Student List on 53% of the vote, giving it 141 MPs in the 250-seat parliament, while Vučić’s Serbian Progressive party (SNS) won 39%, giving it 103.…