Dr Julian Lewis: I think we are getting that balance right, but does the Secretary of State agree that the greatest possible threat to peace and security in Europe would be if modern-day Russia’s success in using old-style Soviet tactics against a non-NATO country were to be replicated against a NATO country? It is not just a question of reassuring the NATO countries: it is a question of making it clear to the Kremlin what they must not do.

[The Secretary of State for Defence (Mr Philip Hammond): My hon. Friend is right, but let us be clear. What they must not do is perpetrate acts of aggression against independent sovereign states such as Ukraine. Because we have special commitments, through our obligations under the Washington treaty, the red line around NATO is even clearer, and we must emphasise it at every opportunity to avoid any danger of miscalculation in the Kremlin or elsewhere.]