By Jon Robinson Sustainable toothbrush brand SURI has raised an extra £6m through a Series A funding round. The London-based company has secured the backing of existing investor JamJar, which was set up by Innocent Drinks founders Richard Reed, Jon Wright and Adam Balon alongside Katie Marraché. JamJar, which has previously backed the likes of Deliveroo, co-led the round alongside V3 Ventures. The round also saw participation from DMG Ventures and further investment from seed backer Hasbro Perks. SURI was founded by Procter & Gamble alumni Mark Rushmore and Gyve Safavi and plans to use the rou…