Since the world’s richest man bought Twitter last year, more than half the workforce has been sacked and scores of users previously banned for breaking Twitter’s rules were reinstated.

Marianna Spring investigates how Elon Musk is transforming one of the world’s most influential social media platforms. She speaks to former insiders and examines evidence that suggests trolling and hate are thriving under the new owner.This is the first episode in BBC Trending's new series 'Trolled'.