He does not understand proper expeditionary ops
And expeditionary ops are of what benefit for the defence of the United Kingdom in the modern world? Defend your assumption that Britain is best defended by assisting the United States in its attempts at world domination and the imposition of their Democracy religion upon all and sundry.
The counter-argument is that, as an island nation we need a navy equipped to defend our shores and an air force equipped to defend our airspace so as to repel any possibility of foreign invasion. For home defence we need a small standing army and a large volunteer reserve militia. What we don't need is to be pursuing military adventures in foreign lands that we withdrew from years ago once we realised that our much vaunted (and often mourned) Empire cost more to maintain than it generated in income.
Participation in the two world wars drained Britain of its wealth. Take a look at Switzerland if you doubt the efficacy of neutrality in maintaining national prosperity.