From what I can remember of our defense cutting
disaster so we can increase the foreign aid budget, so receiving countries like Argentina can afford more weapons to use against us review, the army logistic, engineering, artillery and tank regiments all took a real hammering.

The ConDems have done exactly that in terms of having a now not having A coherent defense structure. An example is where we scrapped out mini carriers and sold our Harriers for next to nothing to the US marines, we have asked any potential enemy, to please not attack us in an out of area location until at least 2020 as we have no air cover capability. I'm sure any enemies like the Argentinians will be happy to oblige by not attacking while we are weak, they will happily wait until 2020 when we are strong again.

The cutting up of a delivered system with the Nimrods was a spiteful criminal act as bad as the Labour's governments scrapping of TRS2 and having all of the prototypes destroyed. In fact even worse as at least the TSR2's were prototypes and not production aircraft, in the process of being handed over to the RAF. What makes this decision even more stupid is that our other Intel aircraft due to Iraq and Afghanistan are being massively over worked, so they are well ahead of their air frame flying hours, compared to what was expected.
So in the future in a major conflict like Iran, apart from our army, not having adequate logistical support, engineering backup to cross rivers etc, not enough artillery or tanks, and being totally reliant on US carrier support, we should be fine.