The HybridFLEX train is the UK’s first hybrid-powered passenger train unveiled by Chiltern Railways, a train operating company. The new HybridFLEX train will deliver emission-free battery operation.

Earlier this year, two of Insider's reporters took first-class trains in the UK and the US. In June, UK-based reporter Mikhaila Friel traveled in first class on Avanti West Coast's train from Glasgow, ...