Donald Trump and Vladimir Putin have held their first face-to-face talks, on the sidelines of the G20 summit in the German city of Hamburg. "It's an honour to be with you," Mr Trump told Mr Putin, who responded: "I'm delighted to meet you personally." Both sides listed a wide range of topics discussed, including Russia's alleged meddling in the US election. Climate change and trade are set to dominate the two-day G20 meeting. Violent clashes between protesters and police have taken place in the streets outside the venue, with dozens left injured. A huge police operation is trying to keep demonstrators - who are protesting against the presence of Mr Trump and Mr Putin, climate change and global wealth inequalities - well away from the summit venue, and water cannon have been deployed. Earlier,…