The woodland is luminous, the air lucid, waiting a pleasure. We board, and momentarily glide quietly before the rich rhythmic rumble returns. The Talyllyn Railway is gorgeously romantic. Yet this lustrous woodland exists despite of, not because of it. Coal has driven the climate crisis and sourcing it from Russia is now intolerable, so biofuels like e-coal (an amalgam of coal-dust, olive stones and molasses) are being trialled, despite being expensive and the long-term impacts on engines as yet unknown.

Read more in the August 2022 edition of BBC Countryfile Magazine