On a cool September night I stepped into the silent, dust-filled rooms of the Royal Gunpowder Mills in Waltham Abbey — a place where centuries of explosions, tragedy, and innovation have left their mark. With my team beside me, I set out to uncover whether the flickering lights, shifting shadows, and strange sensations we encountered were echoes of faulty electrics and wildlife… or something far older, lingering in the Mills’ haunted history.