Upto to date then

Libdems think having 4 nuke subs at sea is an expensive outdated relic of the cold war - useless in todays asymetric wars on terror.

The army agree and want to replace it with a fleet of tanks to fight the soviets in Germany.

The air force agree and want to replace it with an air superiority fighter to fight the soviet airforce

The navy want to replace it with a carrier fleet to fight the Japanese at Pearl Harbour or possibly the French at Trafalgar.