Saturdays' Frankie Bridge confronts online troll

Saturdays' singer Frankie Bridge was trolled on social media, with some users branding her “fat” while she was pregnant with her first child.

So what drives someone to send abusive messages to strangers?

She spoke to someone who trolls people online to ask him. For legal reasons, he cannot be named.

You can watch the full film on the Victoria Derbyshire website.