UK banking reshapes as traditional lenders expand and digital rivals struggle
The UK banking sector saw major shifts in 2024 and 2025, with big-name acquisitions and changing customer habits. Traditional lenders expanded by buying retail banking arms, while digital challengers faced slower growth and tighter margins. The latest figures also reveal how economic uncertainty reshaped borrowing and saving trends. In 2024, Barclays acquired Tesco’s banking division for £600 million. Around the same time, NatWest took over Sainsbury’s Bank’s core operations. These deals marked a push by established lenders to absorb retail-focused financial services.
By 2025, the picture for digital banks had shifted. Monzo saw mixed results in current account switching, gaining two new customers for every one it lost. Meanwhile, Starling Bank experienced a net loss of 8,433 current account switchers over the year.
Financial performance across challenger and specialist banks also changed. The average net interest margin climbed slightly to 2.9%, up from 2.7% in the previous year. Cost-cutting efforts paid off, with the cost-to-income ratio falling from 65% to 58.2%. Yet pre-tax profit growth remained sluggish at just 0.5%.
Customer behaviour reflected broader economic concerns. Loan growth slowed sharply to 4.5%, down from 8.9% the year before, as borrowers focused on repaying existing debt rather than taking on new loans. Deposit growth also halved, dropping from 12.3% to 6.7%. The data highlights a cautious banking environment in 2025. Traditional banks expanded through acquisitions, while digital players faced challenges in customer retention and growth. With loan and deposit rates slowing, the sector appears to be adjusting to tighter financial conditions and shifting consumer priorities.
