- The armed forces would run out of ammunition "in a few days" if called upon to fight
- The UK lacks the ability to defend its skies against the level of missile and drone strikes that Ukraine is enduring
- It would take five to 10 years for the army to be able to field a war-fighting division of some 25,000 to 30,000 troops backed by tanks, artillery and helicopters
- Some 30% of UK forces on high readiness are reservists who are unable to mobilise within NATO timelines - "so we'd turn up under strength"
- The majority of the army's fleet of armoured vehicles, including tanks, was built between 30 to 60 years ago and full replacements are not due for years
Source: https://news.sky.com/story/us-general-warns-british-army-no-...
Some of those comments are perhaps a bit unfair but it's well known the weakness of European armies.