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On NATO, the extremes are a risk Britain cannot afford

For once, Keir Starmer is right.

When he says that Reform UK on the Hard Right and the Greens on the Hard Left pose risks to NATO and, by extension, Britain’s national security, he is identifying something serious.

From opposite ideological poles, both parties advance instincts that would weaken the alliance that has underpinned European security for over seventy years.

That should concern all of us.

Reform’s worldview is, from what I can tell, rooted in a kind of muscular unilateralism. Alliances are treated with suspicion. Multilateral commitments are portrayed as constraints on sovereignty. There is an underlying assumption that Britain would be stronger if it stood more alone.

History suggests otherwise.

Britain’s security has never rested on ‘splendid’ isolation. It has rested on partnership-on shared defence, intelligence cooperation and collective defence. NATO is not a bureaucratic luxury. It is the backbone of that system.

On the other side of the spectrum, elements within the Green movement have long been uncomfortable with NATO’s very premise. There remains a strain of thought that sees military alliances as inherently proactive and imagines that scaling back defence commitments would somehow make the world safer.

It would not.

In an increasingly dangerous world, with Russia waging war in Europe, authoritarian regimes flexing their muscles and global instability rising, weakening NATO would not reduce tensions. It would invite miscalculation.

Deterrence only works if it is still credible.

Now, let’s be clear. Supporting NATO does not mean pretending it is perfect. It must adapt to new threats. It must modernise. It must ensure democratic accountability and maintain public consent. Liberal internationalists should always press for reform and renewal.

But reform (small R) is not the same as retreat.

There is a profound difference between improving an alliance and hollowing it out.

The superficial attraction of the Hard Right and Hard Left to some may, arguably, be understandable. They offer clarity. They offer bold rhetoric. They promise decisive breaks with the status quo. In unsettled times, that can feel appealing.

But national security is not the place for ideological experiments.

Britain’s safety rests on stable alliances, credible commitments and steady leadership. NATO has preserved peace in Europe for decades precisely because it binds democracies together in collective defence.

Undermining that framework, whether in the name of nationalist sovereignty or moral idealism, would make us weaker, not stronger.

This is where the Liberal Democrats must be absolutely clear.

We are the party of responsible internationalism. We believe in NATO because we believe in cooperation between democracies. We believe in reform because we believe institutions must evolve. And we reject the isolationism of the Hard Right and the naïveté of the Hard Left.

The political centre is not a halfway house between extremes. It is the place where serious governing happens. In a world that is becoming more volatile, not less, Britain needs steadiness, credibility and alliances that work.

On NATO, that means strength and reform, not retreat.

We must back Vince Cable on a full and fair investigation into Andrew