Long involvement in The Spectator’s Economic Innovator Awards has taught me that entrepreneurs come in all shapes and sizes. Even so, when I met the founder of a British rocket-science venture called Pulsar Fusion, I was looking for a bespectacled boffin rather than someone Imight have presumed was a musical-theatre actor – or a star of one of those TV reality shows populated only by the young, fit and blond, such as Made In Chelsea.