The UK economy grew at a sluggish pace of 0.3 per cent in the second quarter of the year, official data has shown, another major setback for Chancellor Rachel Reeves’ as she hopes to oversee higher growth. The Office for National Statistics left its growth figure unchanged from a previous estimate as it confirmed its figures for growth in the second quarter, which is likely to be viewed cautiously by Treasury officials. The figure is much smaller than 0.7 per cennt growth seen in the first three months of the year, with firms reporting they…