Britain must not retreat from the world

When you are the Foreign Secretary of United Kingdom and your armed forces are in action around the globe, you meet a lot of generals. Too many, to my mind, since Britain's habit has been to rotate the top brass in Iraq or Afghanistan every year, instead of telling the best general to go there and stay there till he has won. Yet, General Sir Nick Carter, who spoke recently about the need to keep up with potential adversaries, stands out in my mind from visits to bunkers in Helmand, because he particularly seemed to know what he was doing. So when he says "the threats we face are not thousands of miles away, but are now on Europe's doorstep", I recommend that we all listen to him. He was referring in part to the massive modernisation programme of the Russian armed forces, prompted by their faltering performance against Georgia in 2008. With a smaller economy than Britain's, Russian President Vladimir Putin now has formidable air, sea and land forces, supported by a readiness to use social media and cyberattacks to paralyse an opponent.

More broadly, the booming stock markets of a growing global economy can stop us noticing serious dangers. Arms races are under way in the Asia-Pacific region and the Middle East. North Korean leader Kim Jong-un has shown that a determined despot can develop nuclear weapons. Terrorism rapidly surfaces when states collapse. Within a decade, artificial intelligence will be revolutionising warfare. Without the best technology, a country will find that its radar is showing the previous day's airspace, its GPS systems are all pointing at the wrong targets, and incoming aircraft are convincing defending computers that they are on the same side.

Impressive hardware without up-to-the-minute software will be as useless as cavalry against machine guns. The security case for strong defences is thus overwhelming, but there is a second argument that generals are less qualified to advance, but which is now crucial: That while Britain leaves the European Union (EU), it absolutely must not retreat from the rest of the world. Be in no doubt that the United Kingdom benefits enormously from its international presence and reputation - be it diplomatic, military, humanitarian or educational. And Britain's friends everywhere are currently looking at it, quizzically and rather searchingly, as it negotiates Brexit to assess whether we are shrinking back from them as well. Is this the UK sorting out a more sustainable relationship with its neighbours, they wonder, or is it the start of a new insularity and impending irrelevance? IS Britain so preoccupied with internal arguments that it pulls back from being one of the most respected pillars of global stability, progress and security? Feeding the wrong impression is no one's intention. However, people voted on the EU, few wanted to weaken the links beyond Europe. British Prime Minister Theresa May has rightly spoken of "Global Britain" and British Foreign Secretary Boris Johnson has proclaimed a new energy in engaging with the traumas of the Middle East.

Britain's Chinooks are being sent to Mali to help France, and its aid budget is as strong as ever. Even so, Britain must be careful not to send the wrong message by accident. The Foreign Office is reducing some diplomatic positions in Asia and Africa in order to strengthen embassies around Europe. With a tiny fraction of the £3 billion (Dh15.4 billion) contingency fund that the Chancellor of the Exchequer, Philip Hammond, has announced to deal with the uncertainties of Brexit, it could keep those positions in place. For foreign nations any change, however small, can make a big impact. In defence, talk of reducing amphibious ships, or the Parachute Regiment or Royal Marines is even more worrying. Leaks of discussions are not always a guide to what is really at stake, and might often highlight the worst-case options. When they hammer that out, they should bear in mind that not only is General Carter's analysis correct, but that a decline in Britain's ability to project military force and diplomatic reach, as it withdraws from the EU, will be a great error. When we talk of Global Britain, we have to mean it.