Spain's opposition Popular Party (PP) has won a landslide victory in Sunday's elections, seizing an absolute majority of seats in parliament.

The Socialists conceded a humiliating defeat as official results showed the PP projected to take 187 seats in the 350-seat lower house, with 84 per cent of votes counted.

The Socialists plummeted from 169 to 110, their worst performance ever.

Al Jazeera's Andrew Simmons reports from Madrid.