The £2.3bn increase represented growth of around 15% year-on-year, according to the lender’s latest interim results.
The lender also reported growth in its mortgage book, with UK mortgage balances increasing to £176.7bn as of 30 June 2026, compared with £166.8bn a year earlier.
Barclays said UK lending balances grew by 5% year-on-year during the first half of 2026, with higher lending balances driven primarily by growth in mortgages.
New mortgage lending at average 70% LTV
The average loan to value (LTV) of new mortgage lending remained unchanged year-on-year at 70%, while the average LTV across the wider mortgage portfolio stood at 57%, compared with 54% a year earlier.
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Barclays UK reported an 8% increase in net interest income, rising to £3.986bn in the first half of 2026 from £3.677bn a year earlier.
The net interest margin increased to 3.7%, up from 3.55% in the same period last year.
Credit performance remains stable despite higher impairment charges
Barclays UK reported credit impairment charges of £338m for the first half of 2026, compared with £237m in the same period last year.
The lender said the increase reflected stable underlying credit performance, while the previous year had benefitted from a recalibration adjustment in the retail credit card portfolio.
Barclays UK reported total income of £4.517bn for the first half of 2026, up 8% year-on-year, while profit before tax increased 10% to £1.767bn.
