The personal & business banking (PBB) division of RBS has posted an operating profit of £747m for the second quarter of 2015, a surge of 40% compared with £530m a year ago.

The bank’s PBB division comprises of two reportable segments: UK Personal & Business Banking (UK PBB) that includes Williams & Glyn; and Ulster Bank.

The UK PBB segment contributed £667m to the division’s quarterly operating profit, while Ulster Bank contributed £80m, the bank said in its earnings statement.

For the quarter ended 30 June 2015, the division’s total income declined to £1.65bn from £1.71bn in the second quarter of 2014. Operating expenses declined to £943m from £1.71bn.

The PBB division’s net interest income was £1.28bn for the quarter, while non-interest income was £368m.

Overall, the RBS group posted net profit of £293m million for the second quarter of 2015, a rise of 27% compared to £230m in year ago second quarter.