In the 1970s, Mogens Glistrup, a prominent Danish politician, became famous for suggesting that his country replace its armed forces with a recorded message saying “we surrender” in Russian.

Glistrup is no longer with us but his approach to defence seems to be gaining ground. Europe’s ability to use military force is dwindling fast, and with it the power of Europeans to defend their interests around the world. It is true that there are many troops from European countries deployed in Afghanistan, and the French are in Mali. But, behind the headlines, military capacity is shrinking.

Since 2008, in response to the economic downturn, most big European countries have cut defence spending by 10-15 per cent. The longer-term trends are even more striking. Britain’s Royal Air Force now has just a quarter of the number of combat aircraft it had in the 1970s. The Royal Navy has 19 destroyers and frigates, compared with 69 in 1977. The British army is scheduled to shrink to 82,000 soldiers, its smallest size since the Napoleonic wars. In 1990 Britain had 27 submarines (excluding those that carry ballistic missiles) and France had 17. The two countries now have seven and six respectively.