Henry is Great Fen Ecology and Recording Officer for the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire, with responsibility for managing the monitoring of the Great Fen, including training volunteers in ecological monitoring.

He has a wide general knowledge of natural history with particular expertise in birds, dragonflies, reptiles, amphibians and mammals (particularly bats, dormice and other small mammals, and as a bird ringer), as well as botany. He also has an extensive knowledge of ecology and conservation.

Henry has led holidays to places as diverse as Costa Rica, Galapagos, Romania, Hungary, Lesvos, the Burren and his home area of Rutland.