Energea Travelite 34W 5V/6.8A 4-Port Wall Charger
I bought the Energea Travelite 34W 4-Port Wall Charger at Challenger Bugis for S$59, or S$53.10 with the member's discount. It delivers a combined 6.8A across four ports, two at 1A and two at 2.4A, with a US-to-UK adapter.