Chicken Leg, you might be right... but even if we were to spend the money now, we wouldn't get the capability until after we're supposed to be pulling out! By which point the conflict will most likely have changed, and we'll need different kit that we probably got rid of in the rush to pay for kit that we no longer need!
What is the UK military primarily for? To defend the UK and its dependancies and interests. Lets not lose sight of that! Because this high-level infighting is self-defeating, and all 3 services will lose out more than if they all pulled together!