LONDON : Prime Minister Boris Johnson on Tuesday promised to use the COVID-19 pandemic as a catalyst to build a stronger Britain led by private enterprise, and took aim at “potshot, snipeshot" opponents who want to prolong government bailout programs forever.In a sometimes combative speech to his Conservative Party, Johnson said simply defeating the virus wasn’t enough, because history has shown that "events of this magnitude" often lead to social and economic change.“We see these moments as the time to learn, and to improve on the world that went before, and that’s why this government will build back better," Johnson said in a video address to the annual party conference, which is being held online this year due to the pandemic.The speech.