On a usual day, Diego Galdino delivers food across London on his trusty e-bike.

But in his spare time, the Brazilian expat moonlights as a pickpocket hunter. His vigilante actions have gone viral, with videos amassing up to 27 million views.

The 32-year-old patrols popular tourist hotspots such as Buckingham Palace and Oxford Street, confronting unsuspecting thieves and exposing them for the world to see. He says the response has been overwhelming, with supporters recognising him on the streets, and media outlets reaching out from all over the world.

“If I can stop just one person being robbed,” he says, “it’s worth it”.