Britain overtook it last year to become second largest EU economy . Clegg hopes by 2020 the UK will be the ' powerhouse of Europe ' Sets out 2020 to see global leapfrog ##ging to become EU 's biggest .
Britain overtook France last year to become second largest EU economy . Clegg claims by 2035 the UK will be the 'powerhouse of Europe ' Sets out plan to see Britain leapfrog Germany to become EU 's biggest .