Systemic corruption by politicians divides political parties in Spain. It's also one of the main causes of the current political impasse. Spain's conservative People's Party has won two general elections within a year but has failed to muster a parliamentary majority because of corruption allegations against many of its members. New political parties Podemos and Ciudadanos argue the two mainstream parties previously turned a blind eye to systemic corruption. These new parties have won voters by calling for a cleaning-up of politics. But the campaign against corruption is a tough one, as our correspondents report.

A programme prepared by Emerald Maxwell and Elom Toble