A former NATO chief has urged the UK to bring back mandatory national service to boost the nation's security . Lord George Robertson, an ex-NATO secretary general, called for the UK government to consider a model similar to Sweden's that would have roles for people of all ages in a bid to enhance the country's resilience. Lord George previously said the government was "underprepared" for a possible attack in the future . He has since argued to follow Sweden's policy of total defence that