By Jess Jones Former Barclays boss Bob Diamond is set to chair a social media startup challenging Tiktok’s dominance. Diamond’s move to video platform startup Triller, which artists such as Snoop Dogg, The Weeknd and Kendrick Lamar have previously backed – is a significant departure from banking. He resigned from Barclays in 2012 amid the Libor rate-rigging scandal. AGBA, a small US-listed financial services platform based in Hong Kong, bought Triller in an all-share deal earlier this month. Diamond, who has chaired AGBA since September, will continue in the job for the new combined company. S…