Trump's Provocation Raises Questions About Britain's Defence Readiness
Former US President Donald Trump has declared he is "seriously considering" withdrawing the United States from NATO while mocking the British armed forces for operating what he called "toy" aircraft carriers. While his language may be exaggerated, it has focused attention on whether Britain, once the world's foremost naval power, can adequately defend itself in the contemporary security landscape.
The Current State of UK Defence Capabilities
The British army has diminished to a size comparable to that during the Napoleonic wars of the early nineteenth century. Meanwhile, Royal Navy vessels frequently undergo repairs or refits, rendering them potentially unavailable during emergencies. As of 1 April 2025, UK armed forces personnel, including reserves, totalled 181,890. Equipment inventories included:
- Maritime: Nine submarines, 57 Royal Navy surface fleet vessels, and 13 Royal Fleet Auxiliary ships
- Land: 997 armoured personnel carriers, 1,903 protected mobility vehicles, and 1,055 armoured fighting vehicles
- Air: 504 fixed-wing fighters, 276 rotary-wing platforms, and 180 uncrewed aircraft systems (drones)
The Changing Nature of Modern Warfare
Traditional metrics of military strength may no longer be paramount given the evolution of "new warfare" incorporating drones, robotics, cyber attacks, espionage, and long-range missiles targeting both military objectives and civilian infrastructure. Conflicts in Ukraine and the Middle East have demonstrated how rapidly technology has transformed combat in recent years.
This technological revolution suggests that investing in affordable drones rather than tanks, and in anti-missile systems rather than expensive fighter jets with costly munitions, represents a more sensible contemporary approach. While deficiencies in older technologies have become less relevant, Britain's adaptation to this new paradigm remains incomplete.
Progress and Shortcomings in Modernisation Efforts
The encouraging development is that last summer's Strategic Defence Review, alongside various parliamentary committee investigations, has identified these challenges, with ministers fully acknowledging them. The public can observe how even the United States and wealthy Gulf states face threats from asymmetric warfare, while repeated attacks on Israel have demonstrated the value of effective air defence systems like the Iron Dome.
However, the discouraging reality is that minimal progress has been made in modernising systems, equipment, or personnel. The Strategic Defence Review acknowledged that if Britain were engaged in state-on-state conflict, it would likely face air and missile assaults from drones, cruise missiles, and ballistic missiles, including Russian hypersonic weapons capable of exceeding five times the speed of sound and potentially evading radar detection.
These attacks would specifically target military assets and critical national infrastructure. Yet few, if any, power stations (including nuclear facilities), railways, roads, ports, communications networks, or hospitals possess specific defensive measures. Some initiatives are underway within NATO and with European partners, such as Germany's European Sky Shield initiative, but substantial work remains.
Britain's Current Defence Framework
Britain is not defenceless, but its defensive capabilities are increasingly outdated. The current "multilayered" approach, integrated within NATO, utilises all three military services: Royal Navy Type-45 destroyers can intercept missiles; the army operates seven relatively new Sky Sabre medium-range, ground-based, mobile air-defence systems; and the Royal Air Force can deploy its quick-reaction force of Typhoon aircraft.
Nevertheless, all these methods employ expensive missiles and would be deployed against potentially overwhelming swarms of drones or other advanced weapons systems that might evade destruction through technological sophistication or sheer numerical superiority.
The Potential Consequences of US NATO Withdrawal
A US departure from NATO would constitute a disaster, though the severity would depend on what Britain could salvage. At minimum, this would require a bilateral agreement concerning US missile technology supporting Britain's Trident nuclear deterrent and future weapons of mass destruction; intelligence sharing involving Australia, New Zealand, and Canada; and continued collaboration on joint projects and procurement.
In principle, a "European NATO" (including Canada and potentially other nations like Japan, South Korea, Turkey, and Australia) could replicate much of NATO's existing command structure and joint operations. The combined technological, industrial, and economic strength of these powers would significantly surpass Russia's capabilities and potentially rival those of the United States.
However, this arrangement raises questions about shared objectives, highlighted by the ambivalent stance toward Russia exhibited by Hungary, both an EU and NATO member. Currently, European defence structures consist of overlapping, sometimes loosely organised "coalitions of the willing."
The fundamental challenge remains how much funding democratic societies are willing to redirect from public services to deter threats many would prefer to ignore. Some resources could be reallocated by withdrawing from commitments extending beyond Europe, such as the Indo-Pacific AUKUS submarine agreement between Australia, the UK, and the US, and possibly relinquishing territories like the Falklands or the problematic Diego Garcia base.
A Potential Modernisation Shortcut
One straightforward and rapid method to modernise defence systems would involve engaging Ukrainian expertise. Ukraine has demonstrated remarkable effectiveness in developing and implementing defensive measures against Russian aggression domestically and now in Gulf states. Their specialised knowledge could accelerate Britain's adaptation to contemporary warfare realities.
