Skua,
New CGS was also touting a few months ago that Afghanistan was a long-long job (which it is). Unfortunately the Brit public probably don't have the stomach for the long haul and his words are not being repeated by politicians from any party.
The new Defence Review needs to get to the bottom of what the next government really thinks Britain's place in the world is. The current shower of s*ite have spent a vast amount of money trying to be everything but succeeding at little. They haven't spent sufficient to maintain the high-end capabilities well and certainly didn't invest in the expeditionary capability before it was needed.
Do we want to sit here and defend ourselves in our little island and wave 2 fingers at everyone who wants us to participate in the next war - in which case, Typhoon, MRA4, Astute and (maybe) Trident are necessary - or do we just want to do expeditionary in which case big army, less combat air, more ISTAR is what we require. We probably can't afford both and irrespective of what CGS would like to do, the British public appear to have different priorities.
In answer to the original question - no chance of the next govt getting rid of any service. Just won't happen. Would need to be a manifesto pledge and would detract from everything else that they want to do.