The economy grew almost twice as fast as expected in the second quarter of this year – as the UK enjoyed a pick-up in services output and the fastest rise in construction output in almost 50 years, according to official data. The Office for National Statistics (ONS) said gross domestic product jumped 1.1 % on the quarter, the fastest rise in four years, and rose by 1.6% on the year - the highest rise in two years. The figures may raise doubts over how long the Bank of England will keep interest rates at their record low. The services sector enjoyed its fastest growth in three years, expanding by 0.9 % on the quarter - three times as fast as in Q1 and contributing 0.7 percentage points to growth.