Do you have information that the Joint Chiefs of Staff don't about what the threats will be to the UK for the next 30-50 years? That's the time scale that is being planned for. I suggest you read the paper by Michael Codner at the RUSI website www.rusi.org/downloads/assets/FDR2.pdf which lays out clearly the choices facing the UK and where it goes with it's military.
The problem is that procurement takes time - you can't plan for just one type of threat, you have to be able to cover all the bases. If an aircraft carrier or a submarine is suddenly needed, you can't just snap your fingers, or go to Tesco to get it; you have to plan years in advance and sort out the contracts. You then have to oversee the build, ensure that the sea trials go correctly and only when the RN is satisfied that the vessel is fit for purpose will she be accepted into the Fleet.
Aircraft carriers are not mega white elephant projects - they provide a platform from which to perform all sorts of operations including disaster relief. How do you propose we deal with Somalia without a platform like an aircraft carrier from which aerial patrols can be carried out; the SBS, SAS, Marines and Army can be transported there and landed; operations can be planned etc? As the Carriers are already in build, and providing much needed employment at Appledore in Devon for example, they might as well carry on. It would cost more to get out of the contracts.
Air superiority is necessary in conflict and that can be provided from aircraft carriers, without the need to ask if we can park our jets in another country. We do not have to find a friendly nation to provide us with bases in the area in which we are fighting; an aircraft carrier is a big beastie and can hold more than the crew. It can be supplied by RFAs and the RN has Replenishment At Sea down to a fine art.
I don't think there is a less expensive deterrent than Trident; the boats have been built and will go on for quite a while yet.
The £1.5 billion is probably creative accounting as it always is with this govt and defence, and GB can promise what he likes because he won't be in power.
The reality is that redundancies are going to happen in the Armed Forces. The extra £900 million announced this year for Afghanistan comes from the existing defence budget and not from the treasury reserve, and is coming at the cost of closing an RAF base; taking two ships out of service very early and redundancies in the Army and RAF. As the RN is the smallest of the three services at approx 35,000 personnel (Boots the Chemist employ more people than the RN, go figure) it looks as if we may avoid redundancies.
This government has significantly underinvested in Defence for the past 13 years and promising to throw money at the problem to buy the votes of HM Forces won't work. It's too little, too late. The Forces are overstretched, underfunded, and are not happy. I find it appalling that the guys who are in Afghanistan get I think a Council Tax discount and a small bonus per month; whilst a Mod employee on a short term contract gets a bonus of £84,500. That is equivalent to the pay of a Naval Captain (therefore very senior) with 5 years in the rank.
'We need a good military' you say. We have one of the best and most highly trained militaries on the planet. Other nations spend small fortunes sending their officer cadres to our training establishments and staff colleges. Unfortunately, although the military is what keeps this government punching above it's weight, they are not adequately resourced to do the job. Lessons from history are also being ignored; we are an island nation; we import much of our food and energy. How is the Army going to protect the oil tankers coming through the Straits of Hormuz when the Iranians have mined it? We need a Navy for that; they also protect oil rigs and provide for safe passage on the sea. You can't just look at Afghanistan and say that is the be all and end all; you have to look at the bigger picture and what may occur unexpectedly and what assets we will need to deal with that.
It is no good planning for the next conflict, you need to be looking at the one after that. After all, prior planning prevents piss poor performance as they say in the RN.