‘There’s nothing else like it’: Dorset glow-worm survey charms volunteers

The insects are being looked after in a conservation project that encourages visitors to enjoy their piercing' light

Far out in the Channel, the lights of ships at anchor flickered while the lighthouse at Anvil Point emitted its steadier beam. Late on, a crescent moon shone a coppery orange.

But, undoubtedly, the most extraordinary light source to be seen was the vivid green gleam from the glow-worms that inhabit the herb-rich grassland on the cliffs and quarries in this tucked-away corner of southern Britain.