Over most of the world's surface (excluding the North and South Ice Caps), unheated underground spaces such as caves and cellars naturally achieve a constant year round temperature of approximately 52 degrees Fahrenheit.

So anything stored underground will normally be at that temperature.

Hence, cask conditioned ales are ready for drinking when dispensed through a hand operated atmospheric beer pump.

Gas pumps will apply a certain amount of chilling, but are only normally used for rubbish like John Smiths Smooth.

Don T.