Delivery rider Diego Galdino uses social media to expose pickpockets in the British capital, sparking debate on vigilantism and crime control

On a recent weekday, Diego Galdino was on the hunt for pickpockets in central London, patrolling tourist hotspots for familiar suspects and telltale signs of those about to commit theft.

Galdino, however, is not a policeman.

The Brazilian food app delivery rider has become a popular, social media-fuelled vigilante targeting pickpocketing in the British capital.

He started filming – and then trying to disrupt – thieves in action after witnessing several incidents.