I could think of several flaws in this article.
Firstly, as many have rightly pointed out, the majority of the original Chinook order wouldn't come on stream until 2015 by which time the British Army would have left Afghanistan. The first batch arriving in 2013 wouldn't be affected by Cameron's cut. So your argument Lewis is false.
Secondly, on the idea of cutting Frigates. Which ones? The ones currently patroling the Indian Ocean for pirates and using their Lynx and Merlin helos - a capability the Americans and others in the multi-national anti-piracy task force don't have by the way - and generally providing excellent mentoring for other navies? Maybe the ones patroling in the Caribean for drugs and providing excellent soft power? Or maybe the ones protecting traffic passing close to Iran in the Gulf?
As said by John Salt, a lot of what Lewis says (ASW, etc) can be done by Frigates who can also do a lot more.
Again the tanks. Why were the Americans, Canadians and now Australians are considering using heavier armour in Afghanistan? Because its a safer and more accurate projection of force. Being able to get close up in a Leopard II means less civilian casualties and less aggro as a result. Simple economics.
As for Nimrod, after chatting with a good friend who is working on the Global Hawk program, I'm really excited about the idea of using Global Hawk as an ASW, Search & Rescue and Spy platform. Sounds like an excellent use of money!
Lets be honest, this is an awful set of circumstances but while the Tories did indeed sign up to the Typhoon, Nimrod upgrade and other programs (to be fair to the Tories, the F-35 program was barely a twinkle in the eyes of planners when the contracts were dried in 1995, remember that it wasn't until the ealy 2000s that Boeing and Lockheed's prototypes were rolled out) Labour had over 13 years..THIRTEEN YEARS LEWIS COUNT THEM..to either renegotiate or cancel these programs altogether.
They had all that time to sort it out and in the end fiddled while Whitehall burned. That in itself it a more damning indictment to me.