Eurovision history: Portugal

We continue this week’s series on the Eurovision Song Contest with a look at Portugal. It has been competing for nearly half a century but still hasn't been able to snatch the much-revered top spot. Bets are high for this year’s entry: ‘Amar pelos dois’, by Salvador Sobral. But today, we take you to one of the most memorable songs ever. A song that took centre stage in toppling the Salazar regime and led the country into democracy. Here’s our own Carlota Rebelo.