Churchill's mole or "Nellie" N.L.E. Tractors. Winston Churchill sometimes referred to the machine as his mole and the prototype machine was dubbed Nellie. It was lightly armoured and carried no weapons. It was designed to advance upon an enemy position largely below ground level in a trench that it was itself excavating. On reaching the enemy's front line, it would serve as a ramp for the troops and possibly tanks following in its trench.